0 android 创建按钮Button button = new Button(this);
1 android 创建输入框EditText editText = new EditText(this);
2 android 创建文本TextView textView = new TextView(this);
3 android 设置文本显示内容TextView textView = new TextView(this);textView.setText("hello world!");
4 android 设置文本背景色TextView textView = new TextView(this);textView.setBackgroundColor(Color.YELLOW);
5 android 设置文本颜色TextView textView = new TextView(this);textView.setTextColor(Color.YELLOW);
6 android 设置文本文字大小TextView textView = new TextView(this);textView.setTextSize(18);
7 android 设置输入框宽度EditText editText = new EditText(this);editText.setWidth(200);
8 android 设置输入框为密码框EditText editText = new EditText(this);editText.setTransformationMethod(PasswordTransformationMethod.getInstance());
9 android 设置输入框为密码框（xml配置）android:password="true"
10 android 提示对话框的使用AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("你好");builder.setPositiveButton("OK",this);builder.show()需实现android.content.DialogInterface.OnClickListener接口第1/24页
11 android ListView的使用ListView listView = new ListView(this);ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();SimpleAdapter adapter = new SimpleAdapter(this,list,R.layout.list,new String[]{"标题"},new int[]{R.id.TextView01});listView.setAdapter(adapter);listView.setOnItemClickListener(this);然后实现OnItemClickListener接口public void onItemClick(AdapterView<?> parent, View view, int position, long id) {}
12 android 更新ListViewListView listView = new ListView(this);ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();SimpleAdapter adapter = new SimpleAdapter(this,list,R.layout.list,new String[]{"标题"},new int[]{R.id.TextView01});listView.setAdapter(adapter);adapter.notifyDataSetChanged();//通知更新ListView
13 android 建LinearLayoutLinearLayout layoutParant = new LinearLayout(this);
14 android 时间设置对话框的使用DatePickerDialog dlg = new DatePickerDialog(this,this,year,month,day);dlg.show();/*year month day 均为int型，第二个参数为this时，该类需要implements OnDateSetListener并重写public void onDateSet(DatePicker view, intyear, int monthOfYear,int dayOfMonth) {}*/
15 android 创建FrameLayoutFrameLayout layout = new FrameLayout(this);
16 android 触发键盘事件layout.setOnKeyListener(this);//需要implements OnKeyListener并重写以下方法public boolean onKey(View v, int keyCode, KeyEvent event) {return false;//返回是否销毁该事件以接收新的事件，比如返回true按下时可以不断执行这个方法，返回false则执行一次。}
17 android 触发鼠标事件layout.OnTouchListener(this);//需要implements OnTouchListener并重写以下方法public boolean onTouch(View v, MotionEvent event) {return false;//返回是否销毁该事件以接收新的事件，比如返回true按下时可以不断执行这个第2/24页方法，返回false则执行一次。}
18 android 获得屏幕宽度和高度int width = this.getWindow().getWindowManager().getDefaultDisplay().getWidth();int height=this.getWindow().getWindowManager().getDefaultDisplay().getHeight();
19 android 布局添加控件LinearLayout layout = new LinearLayout(this);Button button = new Button(this);layout.addView(button);
20 android intent实现activit之间跳转Intent intent = new Intent();intent.setClass(this, DestActivity.class);startActivity(intent);
21 android intent设置actionIntent intent = new Intent();intent.setAction(intent.ACTION_DIAL);
22 android intent设置dataIntent intent = new Intent();intent.setData(Uri.parse("tel:00000000"));
23 android intent传数据Intent intent = new Intent();intent.putExtra("data", value);//value可以是很多种类型，在接收activity中取出后强制转换或调用相应类型的get函数。
24 android intent取数据String value = (String)getIntent().getExtras().get("data");//orString value = getIntent().getExtras().getString("data");
25 android 利用paint和canvas画图setContentView(new MyView(this));class MyView extends View{public MyView(Context context){super(context);}public void onDraw(Canvas canvas)第3/24页{Paint paint = new Paint();//创建画笔paint.setColor(Color.BLUE);//设置画笔颜色canvas.drawRect(0, 0, 100, 100, paint);//画个正方形，坐标0，0，100，100。}}
26 android 新建对话框Dialog dialog = new Dialog(this);dialog.setTitle("test");//设置标题dialog.addContentView(button,new LayoutParams(-1,-1));//添加控件,-1是设置高度和宽度充满布局，-2是按照需要设置宽度高度。dialog.show();
27 android 取消对话框dialog.cancel();
28对View类刷新显示view.invalidate();//通过这个调用view的onDraw()函数
28 android 对View类刷新显示view.invalidate();//通过这个调用view的onDraw()函数
29 android 使用SurfaceView画图setContentView(new MySurfaceView(this));class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback{SurfaceHolder holder;public MySurfaceView(Context context){super(context);holder = getHolder();holder.addCallback(this);}class MyThread extends Thread{public void run(){ Canvas canvas = holder.lockCanvas(); Paint paint = new Paint();paint.setColor(Color.YELLOW); canvas.drawRect(100, 100, 200, 200, paint); holder.unlockCanvasAndPost(canvas);}}public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {}public void surfaceCreated(SurfaceHolder holder) {new MyThread().start();}public void surfaceDestroyed(SurfaceHolder holder) {}}
30 android 获得控件findViewByIdTextView textView = (TextView) findViewById(R.id.TextView01);
31 android 十六进制设置画笔颜色Paint paint = new Paint();paint.setColor(0xffffffff);//第一个ff是透明度的设置。
32 android 获得String.xml中配置的字符串//在activity中直接调用getText(R.string.app_name);
33 android 去掉应用程序头部requestWindowFeature(Window.FEATURE_NO_TITLE);
34 android 使用SharedPreferences写入数据代码getSharedPreferences("data", 0).edit().putString("aa","bb").commit();
35 android 使用SharedPreferences读取数据代码String data = getSharedPreferences("data",0).getString("item","");//后面的""是默认值，没有取到则赋值为""，如果不想有默认，可以设置null。
36 android 继承SQLiteOpenHelperclass MyHelper extends SQLiteOpenHelper{public MyHelper(Context context, String name, CursorFactory factory,int version) {super(context, name, factory, version);}public void onCreate(SQLiteDatabase db){db.execSQL("CREATE TABLE IF NOT EXISTS testtable (" +"cardno integer primary key," +"username varchar," +"money integer"+")");}public void onUpgrade(SQLiteDatabase db,int oldVersion, int newVersion){第5/24页db.execSQL("DROP TABLE IF EXISTS testtable");onCreate(db);}}
37 android 利用SQLiteOpenHelper打开数据库MyHelper dbHelper = new MyHelper(this,"testtable.db", null, 1);SQLiteDatabase db = dbHelper.getReadableDatabase();//打开只读//或者SQLiteDatabase db = dbHelper.getWritableDatabase();//打开可写
38 android 查询数据表并显示结果Cursor cursor = db.query("testtable", null, null, null, null, null, null);//db的获得请参见“利用SQLiteOpenHelper打开数据库”while(!cursor.isAfterLast()){Log.i("test",cursor.getString(0));cursor.moveToNext();}
39 android Logcat输出打印测试信息Log.i("TAG","TEST");
40 android 数据表插入数据ContentValues values = new ContentValues();values.put("username","admin");values.put("money","10000");db.insert("testtable", null, values);
41 android 使得应用全屏getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams. FLAG_FULLSCREEN);
42 android 设置LinearLayout方向为竖layoutParant.setOrientation(LinearLayout.VERTICAL);
43 android 设置LinearLayout方向为横layoutParant.setOrientation(LinearLayout.HORIZONTAL);
44 android 数据库更新数据ContentValues values = new ContentValues();values.put("username","admin");values.put("money","10000");db.update("testtable",values,"userno=1",null);第6/24页
45 android 数据库删除数据db.delete("testtable","userno=1",null);
46 android 判断sd卡是否存在if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){Log.i("test","SDCARD exists");}else {Log.i("test","SDCARD doesn't exist");}
47 android 创建ImageViewImageView view = new ImageView(this);view.isetImageResource(R.drawable.icon);
48 android 提示信息Toast toast = Toast.makeText(this, "hello", Toast.LENGTH_LONG);toast.show();
49 android 创建单选框以及单选组RadioButton radioButton = new RadioButton(this);RadioButton radioButton2 = new RadioButton(this);radioButton.setText("yes");radioButton2.setText("no");RadioGroup radioGroup = new RadioGroup(this);radioGroup.addView(radioButton);radioGroup.addView(radioButton2);
50 android 新建播放器MediaPlayer MediaPlayer = new MediaPlayer();
51 android 媒体播放器使用//创建MediaPlayerMediaPlayer player = new MediaPlayer();//重置MediaPlayerplayer.reset();try {//设置要播放的文件的路径 player.setDataSource("/sdcard/1.mp3"); //准备播放 player.prepare();}catch (Exception e) {}//开始播放第7/24页player.start();//设置播放完毕事件player.setOnCompletionListener(new OnCompletionListener(){public void onCompletion(MediaPlayer player) {//播完一首循环try {//再次准备播放 player.prepare();} catch (Exception e) {}}});
52 android 媒体播放器暂停player.pause();
53 android 清空cookiesCookieManager.getInstance().removeAllCookie();
54 android 文本设置粗体TextView textView = new TextView(this);TextPaint textPaint = textView.getPaint();textPaint.setFakeBoldText(true);
55 android 网络权限配置<uses-permission android:name="android.permission.INTERNET" />
56 android GL设定背景色gl.glClearColor(0.5f, 0.2f, 0.2f, 1.0f);gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
57 android 创建GL画布public class My3DView extends GLSurfaceView {private GLSurfaceView.Renderer renderer;public My3DView(Context context) {super(context);renderer = new My3DRender();setRenderer(renderer);}}
58 android 创建复选框CheckBox checkBox = new CheckBox(this);
59 android 复选框监听选择/取消事件checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { Log.i("QSR","TEST");} player.start();
60 android 创建菜单//重写下面这个函数public boolean onCreateOptionsMenu(Menu menu) {super.onCreateOptionsMenu(menu);menu.add(0, 1, 1, "test1");menu.add(0,
2, 2, "test2");menu.add(0, 3, 3, "test3");menu.add(0, 4, 4, "test4");return true;
61 android 处理菜单选择事件public boolean onOptionsItemSelected(MenuItem item){int id = item.getItemId();switch (id) {case 1:Log.i("QSR","1");break;case 2:Log.i("QSR","2");break;case 3:Log.i("QSR","3");break;case 4:Log.i("QSR","4");break;default:break;}return super.onOptionsItemSelected(item);}}
62 android 允许程序访问GPS(XML配置)<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
63 android 允许程序访问GSM网络信息(XML配置)<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
64 android 允许程序访问WIFI网络信息(XML配置)<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>第9/24页
65 android 允许程序更新电池状态(XML配置)<uses-permission android:name="android.permission.BATTERY_STATS"/>66 android 允许程序写短信(XML配置)<uses-permission android:name="android.permission.WRITE_SMS"/>
67 android 允许程序设置壁纸(XML配置)<uses-permission android:name="android.permission.SET_WALLPAPER"/>
68 android 允许程序使用蓝牙(XML配置)<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
69 android 允许程序打电话(XML配置)<uses-permission android:name="android.permission.CALL_PHONE"/>
70 android 允许程序使用照相设备(XML配置)<uses-permission android:name="android.permission.CAMERA"/>
71 android 允许程序改变网络状态(XML配置)<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
72 android 允许程序改变WIFI状态(XML配置)<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
73 android 允许程序删除缓存文件(XML配置)<uses-permission android:name="android.permission.DELETE_CACHE_FILES"/>
74 android 允许程序删除包(XML配置)<uses-permission android:name="android.permission.DELETE_PACKAGES"/>
75 android 允许程序禁用键盘锁(XML配置)<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
76 android 允许程序获取任务信息(XML配置)<uses-permission android:name="android.permission.GET_TASKS"/>
77 android 允许程序截获鼠标或键盘等事件(XML配置)<uses-permission android:name="android.permission.INJECT_EVENTS"/>
78 android 允许程序使用socket(XML配置)<uses-permission android:name="android.permission.INTERNET"/>
79 android 允许程序读取日历(XML配置)第10/24页<uses-permission android:name="android.permission.READ_CALENDAR"/>
80 android 允许程序读取系统日志(XML配置)<uses-permission android:name="android.permission.READ_LOGS"/>
81 android 允许程序读取所有者数据(XML配置)<uses-permission android:name="android.permission.READ_OWNER_DATA"/>
82 android 允许程序读取短信(XML配置)<uses-permission android:name="android.permission.READ_SMS"/>
83 android 允许程序重启设备(XML配置)<uses-permission android:name="android.permission.REBOOT"/>
84 android 允许程序录制音频(XML配置)<uses-permission android:name="android.permission.RECORD_AUDIO"/>
85 android 允许程序发送短信(XML配置)<uses-permission android:name="android.permission.SEND_SMS"/>
86 android 允许程序将自己置为最前(XML配置)<uses-permission android:name="android.permission.SET_PROCESS_FOREGROUND"/>
87 android 创建图像图片BitmapResources res = getResources();Bitmap bitmap = BitmapFactory.decodeResource(res, R.drawable.hh);
88 android 取得远程图片HttpURLConnection conn = (HttpURLConnection)
imageUrl.openConnection(); conn.connect();InputStream is = conn.getInputStream();bitmap = BitmapFactory.decodeStream(is);is.close();
89 android 允许程序发送短信(XML配置)<uses-permission android:name="android.permission.SEND_SMS"/>
90 android 启动和结束服务startService(new Intent("qsr.test.MyService"));stopService(new Intent("qsr.test.MyService"));
91 android 创建和配置Servicepublic class MyService extends Service {public IBinder onBind(Intent arg0) {return null;}public void onStart(Intent intent,int startId){super.onStart(intent, startId);//to do something when start}public void onDestroy(){super.onDestroy();//to do something when stop}}//xml配置<service android:name=".MyService"><intent-filter><action android:name="android.intent.action.TEST_SERVICE" /><category a76ndroid:name="android.intent.category.default" /></intent-filter></service>
92 android 获得系统感应设备SensorManager sensorManager =(SensorManager)getSystemService(Context.SENSOR_SERVICE);93 android 设置控件布局参数textView01.setLayoutParams(new AbsoluteLayout.LayoutParams(100,60,0,0);//高100，宽60，x=0，y=0； );94 android 创建Drawable对象Resources res = getResources();Drawable drawable = res.getDrawable(R.drawable.hh);95 android 访问网页Uri uri = Uri.parse("
http://www.google.com");Intent intent = new Intent(Intent.ACTION_VIEW,uri);startActivity(intent);96 android 打电话Uri uri = Uri.parse("tel:00000000");Intent intent = new Intent(Intent.ACTION_DIAL, uri);startActivity(intent);97
97 android 播放歌曲Intent intent = new Intent(Intent.ACTION_VIEW);Uri uri = Uri.parse("file:///sdcard/test.mp3");intent.setDataAndType(uri, "audio/mp3");startActivity(intent);
98 android 发送邮件Intent intent=new Intent(Intent.ACTION_SEND);intent.putExtra(Intent.EXTRA_TEXT, "The email text");intent.setType("text/plain");startActivity(Intent.createChooser(intent,"Choose Email Client"));
99 android 发短信Uri uri = Uri.parse("smsto:123456789");Intent intent = new Intent(Intent.ACTION_SENDTO, uri);intent.putExtra("sms_body", "The SMS text");startActivity(intent);
100 android 安装程序Uri installUri = Uri.fromParts("package","xxx", null);Intent intent = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);startActivity(intent);
101 android 卸载程序Uri uninstallUri = Uri.fromParts("package","xxx", null);Intent intent = new Intent(Intent.ACTION_DELETE, uninstallUri);startActivity(intent);
102 android 从xml配置获得控件对象//TestActivity.javatextView = (TextView) findViewById(R.id.TextView01);//main.xml< TextView android:text = "TextView01"android:id = "@+id/TextView01"android:layout_width = "wrap_content"android:layout_height = "wrap_content"android:layout_x = "60px"android:layout_y = "60px"/>
103 android 获得触摸屏压力public boolean onTouch(View v, MotionEvent event) {float pressure = event.getPressure();return false;}第13/24页
104 android 给文本加上滚动条TextView textView = new TextView(this);textView.setText(string);ScrollView scrollView = new ScrollView(this);scrollView.addView(textView);setContentView(scrollView);
105 android 获得正在运行的所有服务public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);StringBuffer serviceInfo = new StringBuffer();ActivityManager activityManager(ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);List<RunningServiceInfo> services = activityManager.getRunningServices(256);Iterator<RunningServiceInfo> iterator = services.iterator();while (iterator.hasNext()) {RunningServiceInfo si = (RunningServiceInfo)iterator.next();serviceInfo.append("pid: ").append(si.pid);serviceInfo.append("process:").append(si.process);}TextView textView = new TextView(this);textView.setText(serviceInfo.toString());ScrollView scrollView = new ScrollView(this);scrollView.addView(textView);setContentView(scrollView);}
106 android 使用ContentResolver获得联系人姓名和号码ContentResolver cr = getContentResolver();Cursor cur = cr.query(People.CONTENT_URI, null, null, null, null);cur.moveToFirst();do {int nameColumn = cur.getColumnIndex(People.NAME);int phoneColumn = cur.getColumnIndex(People.NUMBER);String name = cur.getString(nameColumn);String phoneNumber = cur.getString(phoneColumn);Toast.makeText(this,name,Toast.LENGTH_LONG).show();Toast.makeText(this,phoneNumber
107 android 创建WebViewWebView webView = new WebView(this);webView.loadData("<html>"+"<head>test</head>"+"<body>te
st</body>"+"</html>", =第14/24页"text/html", "utf-8");
108 android 设置地图是否显示卫星和街道mapView.setSatellite(false);mapView.setStreetView(true);
109 android 单选框清除radioGroup.clearCheck();
110 android 给文本增加链接Linkify.addLinks(mTextView01,Linkify.WEB_URLS);Linkify.addLinks(mTextView02,Linkify.EMAIL_ADDRESSES);Linkify.addLinks(mTextView03,Linkify.PHONE_NUMBERS);
111 android 设置手机震动Vibrator vibrator = (Vibrator)getApplication().getSystemService(Service.VIBRATOR_SERVICE); vibrator.vibrate( new long[]{1000,1000,1000,1000},-1);//震动一秒，停一秒，再震一秒
112 android 创建下拉框Spinner spinner = new Spinner(this);
113 android 给spinner添加事件spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){public void onItemSelected(AdapterView<?> parent,View view,int position,long id) {}public void onNothingSelected(AdapterView<?> parent){}});
114 android 图片的显示方式ImageView imageView = new ImageView(this);imageView.setScaleType(ImageView.ScaleType.FIT_XY);//适应大小imageView.setScaleType(ImageView.ScaleType.CENTER);//原始大小，居中显示
115 android 取得缓存目录File cacheDir = this.getCacheDir();
116 android 取得当前文件目录File fileDir = this.getFilesDir();第15/24页
117 android 判断当前wifi是否可用WifiManager aWiFiManager = (WifiManager)this.getSystemService(Context.WIFI_SERVICE);boolean isEnabled = aWiFiManager.isWifiEnabled);
118 android 判断当前wifi是否已经打开WifiManager aWiFiManager = (WifiManager)this.getSystemService(Context.WIFI_SERVICE);if(aWiFiManager.getWifiState()==WifiManager.WIFI_STATE_ENABLED)Log.i("TEST","it is open");
119 android 判断SIM卡状态TelephonyManager telephonyManager(TelephonyManager)getSystemService(TELEPHONY_SERVICE);if(telephonyManager.getSimState()==telephonyManager.SIM_STATE_READY) {Log.i("TEST","正常");}else if(telephonyManager.getSimState()==telephonyManager.SIM_STATE_ABSENT) {Log.i("TEST","无SIM卡");}
120 android 取得SIM卡商名称TelephonyManager telephonyManager(TelephonyManager)getSystemService(TELEPHONY_SERVICE);String name = telephonyManager.getSimOperatorName();
121 android 为activity增加键盘事件public boolean onKeyDown(int keyCode, KeyEvent event){switch(keyCode){case KeyEvent.KEYCODE_DPAD_UP:Log.i("上",String.valueOf(keyCode));break;case KeyEvent.KEYCODE_DPAD_DOWN:Log.i("下",String.valueOf(keyCode));break;case KeyEvent.KEYCODE_DPAD_LEFT:Log.i("左",String.valueOf(keyCode));break;case KeyEvent.KEYCODE_DPAD_RIGHT:Log.i("右",String.valueOf(keyCode)); = = break;case KeyEvent.KEYCODE_DPAD_CENTER:Log.i("中",String.valueOf(keyCode));break;}return super.onKeyDown(keyCode, event);}
122 android 显示正在运行的程序ActivityManager mActivityManager = (ActivityManager)getSystemService(ACTIVITY_SERVICE);List<ActivityManager.RunningTaskInfo> mRunningTasks =mActivityManager.getRunningTasks(100);for (ActivityManager.RunningTaskInfo task: mRunningTasks){String taskInfo = task.baseActivity.getClassName()+"(ID=" + amTask.id +")");}
123 android 切换横竖屏if(getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);}else if(getRequestedOrientation()==ActivityInfo.SCREEN_ORIENTATION_PORTRAIT){setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);}//PORTRAIT竖；LANDSCAPE横
124 android 判断网络类型是否为GPRSTelephonyManager telephonyManager(TelephonyManager)getSystemService(TELEPHONY_SERVICE);if(telephonyManager.getNetworkType()==telephonyManager.NETWORK_TYPE_GPRS)
125 android 发送http请求给网页String uriAPI = "
http://127.0.0.1:8080/test/index.jsp";HttpPost httpRequest = new HttpPost(uriAPI);List <NameValuePair> params = new ArrayList <NameValuePair>();params.add(new BasicNameValuePair("username", "test")); =try{httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);if(httpResponse.getStatusLine().getStatusCode() == 200){String strResult = EntityUtils.toString(httpResponse.getEntity());}}catch (IOException e){e.printStackTrace();}
126 android 创建带图片的按钮ImageButton imageButton = new ImageButton(this);imageButton.setImageResource(R.drawable.test);
127 android 创建WebViewLinearLayout layout = new LinearLayout(this);Button button = new Button(this);layout.addView(button);layout.removeView(button);
128 android layout设置背景图片LinearLayout layout = new LinearLayout(this);layout.setBackgroundResource(R.drawable.hh);//图片放在drawable下了，名字是hh.jpg
129 android 设置铃声Intent intent = new Intent( RingtoneManager.ACTION_RINGTONE_PICKER);
130 android 设置网络 请求方式/缓存/格式/编码HttpURLConnection con=(HttpURLConnection)url.openConnection();con.setUseCaches(false);//不使用缓存con.setRequestMethod("POST");//请求方式是postcon.setRequestProperty("Content-Type","text/xml");//格式con.setRequestProperty("Charset", "UTF-8");//编码
131 android 判断是否为有效的网络urlURLUtil.isNetworkUrl(strPath)
132 android 创建垂直滚动条ScrollView scrollView = new ScrollView(this);第18/24页
133 android 创建水平滚动条HorizontalScrollView horizontalScrollView= new HorizontalScrollView(this);
134 android 创建自动完成文本框AutoCompleteTextView autoCompleteTextView = new AutoCompleteTextView(this);
135 android 创建地图控件MapViewMapView mapView = new MapView(this);
136 android 设置地图放大系数mapController = mapView.getController();mapController.setZoom(12);
137 android layout增加和删除控件LinearLayout layout = new LinearLayout(this);Button button = new Button(this);layout.addView(button);layout.removeView(button);
138 android 刷新地图显示函数//继承MapActivity并重写以下方法public void refreshMapView(){}
139 android 创建LocationManagerLocationManager locationManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
140 android 设置webView的javascript有效WebView webView = new WebView(this);webView.setJavaScriptEnabled(true);
141 android 设置webView的保存密码有效WebView webView = new WebView(this);webSettings.setSavePassword(true);
142 android 获得PowerManagerPowerManager powerManager = (PowerManager)getSystemService(Context.POWER_SERVICE);
143 android 相机的预览parameters.setPreviewSize(640, 480);//参数的其他设定参考“设置相机图片大小和像素等”camera.setPreviewDisplay(surfaceHolder);第这里是个SurfaceHolder对象camera.startPreview();camera.stopPreview();
144 android Google Map的移动GeoPoint point = new GeoPoint(xxx, yyy);MapController controller = mapView.getController();controller.animateTo(point);
145 android 设置画笔粗细Paint paint= new Paint();paint.setStrokeWidth(1);
146 android 打开相机Camera.open();147 android 设置相机图片大小和像素等Camera.Parameters parameters = camera.getParameters(); //设置相片格式为JPEGparameters.setPictureFormat(PixelFormat.JPEG);//设置图片分辨率大小parameters.setPictureSize(640, 480);camera.setParameters(parameters);
148 android 将屏幕亮着PowerManager.WakeLock wakeLock = mPowerManager.newWakeLock (PowerManager.SCREEN_BRIGHT_WAKE_LOCK,"BackLight");
149 android 暂停和恢复activityprotected void
onPause(){super.onPause();}protected void onResume(){super.onResume();}
150 android 保存和恢复canvas设置canvas.save();//保存设置//之间做一些变换，转移，拉伸等操作canvas.restore();//恢复设置Intent search = new Intent(Intent.ACTION_WEB_SEARCH);search.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);search.putExtra(SearchManager.QUERY,"new york");startActivity(search);152 android 设置播放器音量mediaPlayer.setVolume(10, 10);153 android 播放器跳转到具体位置mediaPlayer.seekTo(0);//0的单位是毫秒154 android 获得手机号码和手机串号(IMEI)TelephonyManager telephonyManager(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);String imei = telephonyManager.getDeviceId();String tel = telephonyManager.getLine1Number();155 android 闹钟设置代码//接受闹铃并显示提示class AlarmReceiver extends BroadcastReceiver {public void onReceive(Context context, Intent intent) {Toast.makeText(context, "时间到", Toast.LENGTH_LONG).show();}}// 实例化自定义的 BroadcastReceiverAlarmReceiver receiver = new AlarmReceiver();IntentFilter filter = new IntentFilter();filter.addAction("android.intent.action.BOOT_COMPLETED");// 以编程方式注册 BroadcastReceiver 。xml配置方式见下// 一般在 OnStart 时注册，在 OnStop 时取消注册registerReceiver(receiver, filter);Intent intent = new Intent(this, AlarmReceiver.class);PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); //一次闹铃alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() +1000, pendingIntent);//周期闹铃alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 1000, 10000, pendingIntent);//xml配置<receiver android:name=".AlarmReceiver"><intent-filter> =第21/24页<action android:name="android.intent.action.BOOT_COMPLETED" /> </intent-filter></receiver><uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />156 android 接收系统启动完毕的broadcast的权限<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />157 android 多媒体录制MediaRecorder recorder = new MediaRecorder();recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //视频recorder.setAudioSource(MediaRecorder.AudioSource.MIC); //音频recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);recorder.setOutputFile("/sdcard/media/1.3gp");try {recorder.prepare();} catch (IllegalStateException e) {e.printStackTrace();}catch (IOException e) {e.printStackTrace();}recorder.start();158 android 视频播放VideoView videoView = new VideoView(this);setContentView(videoView);videoView.setVideoURI(Uri.parse("/sdcard/1.3gp"));videoView.requestFocus();videoView.start();159 android 绘制文字canvas.drawText(str, 30, 30, paint);160 android 判断QWERTY键盘硬件是否滑出Configuration config = getResources().getConfiguration();if(config.hardKeyboardHidden == Configuration.KEYBOARDHIDDEN_NO){}else if(config.hardKeyboardHidden == Configuration.KEYBOARDHIDDEN_YES) {}161 android 清除手机cookieCookieSyncManager.createInstance(getApplicationContext());CookieManager.getInstance().removeAllCookie();162 android 读写文件读：public String ReadSettings(Context context){第22/24页FileInputStream fIn = null;InputStreamReader isr = null;char[] inputBuffer = new char[255];String data = null;try{fIn = openFileInput("settings.dat");isr = new InputStreamReader(fIn);isr.read(inputBuffer);data = new String(inputBuffer);Toast.makeText(context, "Settings read",Toast.LENGTH_SHORT).show(); }catch (Exception e) {e.printStackTrace();Toast.makeText(context, "Settings not read",Toast.LENGTH_SHORT).show(); }finally {try {isr.close();fIn.close();} catch (IOException e) {e.printStackTrace();}}return data;}写：public void WriteSettings(Context context, String data){FileOutputStream fOut = null;OutputStreamWriter osw = null;try{fOut = openFileOutput("settings.dat",MODE_PRIVATE);osw = new OutputStreamWriter(fOut);osw.write(data);osw.flush();Toast.makeText(context, "Settings saved",Toast.LENGTH_SHORT).show(); }catch (Exception e) {e.printStackTrace();Toast.makeText(context, "Settings not saved",Toast.LENGTH_SHORT).show(); }finally {try {osw.close();fOut.close();第23/24页} catch (IOException e) {e.printStackTrace();}}}163 android 判断不可卸载的程序PackageManager mPm = getPackageManager();List<ApplicationInfo> installedAppList =mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKA