常用代码1 活动管理器?权限 uses-permission android:nameandroid.permission.GET_TASKS/?代码 Activ
常用代码
1 活动管理器?权限 <uses-permission android:name="android.permission.GET_TASKS"/>?代码 ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);?
2 警报管理器 权限?代码 AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);?
3 音频管理器 权限?代码 AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);?4 剪贴板管理器 权限?代码 ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);?
5 连接管理器 权限 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>?代码 ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVIT?
6 输入法管理器 权限?代码 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_S)?7 键盘管理器 权限?代码 KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);?
8 布局解压器管理器 权限?代码 LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9 位置管理器 权限?代码 LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);?
10 通知管理器 权限?代码 NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATIO)?
11 电源管理器 权限 <uses-permission android:name="android.permission.DEVICE_POWER"/>?代码 PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);?
12 搜索管理器 权限?代码 SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);?
13 传感器管理器 权限?代码 SensorManager sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);?
14 电话管理器 权限 <uses-permission android:name="android.permission.READ_PHONE_STATE"/>?代码 TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);?
15 振动器 权限 <uses-permission android:name="android.permission.VIBRATE"/>?代码 Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);?
16 墙纸 权限 <uses-permission android:name="android.permission.SET_WALLPAPER"/>?代码 WallpaperService wallpaperService = (WallpaperService) getSystemService(Context.WALLPAPER_SERVICE);?
17 Wi-Fi管理器 权限 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>?代码 WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);?
18 窗口管理器 权限?代码 WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);?
19获取用户android手机 机器码和手机号?TelephonyManager tm = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);? String imei = tm.getDeviceId();//获取机器码? String tel = tm.getLine1Number();//获取手机号?20设置为横屏?setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);?21无标题栏、全屏?//无标题栏?requestWindowFeature(Window.FEATURE_NO_TITLE); //要在setcontentView之前哦?//全屏模式?getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,?WindowManager.LayoutParams.FLAG_FULLSCREEN);?
22 获取屏幕宽高?DisplayMetrics dm = new DisplayMetrics();?//获取窗口属性?getWindowManager().getDefaultDisplay().getMetrics(dm);?int screenWidth = dm.widthPixels;//320?int screenHeight = dm.heightPixels;//480?
23使用样式表?在 res/values下面新建一个XML文件style.xml ，然后写下如下代码?<?xml version="1.0" encoding="utf-8"?>?<resources>?<style name="style1">?<item name="android:textSize">18sp</item>?<item name="android:textColor">#EC9237</item>?</style>?<style name="style2"><item name="android:textSize">10sp</item>?<item name="android:textColor">#FF9237</item>?</style>?</resources>?
使用：?<TextView?style="@style/style1"//调用style?android:layout_width="wrap_content"?android:layout_height="wrap_content"?android:text="样式1"?android:id="@+id/Tv1">?</TextView>?
24使用布局文件，切换 布局?建立两个布局文件?在事件里面写代码?@Override?public void onClick(View v) {?helllo.this.setContentView(R.layout.layout2);?Button tempBtn=(Button)findViewById(R.id.btn_click1);?tempBtn.setOnClickListener(new Button.OnClickListener(){?@Override?public void onClick(View v) {?helllo.this.setContentView(R.layout.xxx);?}?});?
=========================================================================1.Intent用法?Intent it = new Intent(Activity.Main.this, Activity2.class);?startActivity(it);?
2. 向下一个Activity传递数据（使用Bundle和Intent.putExtras）?Intent it = new Intent(Activity.Main.this, Activity2.class);?Bundle bundle=new Bundle();?bundle.putString("name", "This is from MainActivity!");?it.putExtras(bundle); // it.putExtra(“test”, "shuju”);?startActivity(it); // startActivityForResult(it,REQUEST_CODE);?对于数据 的获取可以采用：?Bundle bundle=getIntent().getExtras();?String name=bundle.getString("name");?
3. 向上一个Activity返回结果（使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动 的Activity）?Intent intent=getIntent();?Bundle bundle2=new Bundle();?bundle2.putString("name", "This is from ShowMsg!");?intent.putExtras(bundle2);?setResult(RESULT_OK, intent);?
4. 回调上一个Activity的结果处理函数（onActivityResult）?@Override?protected void onActivityResult(int requestCode, int resultCode, Intent data) {?// TODO Auto-generated method stub?super.onActivityResult(requestCode, resultCode, data);?if (requestCode==REQUEST_CODE){?if(resultCode==RESULT_CANCELED)?setTitle("cancle");?else if (resultCode==RESULT_OK) {?String temp=null;?Bundle bundle=data.getExtras();?if(bundle!=null) temp=bundle.getString("name");?setTitle(temp);?}?}?}?
显示网页?1. Uri uri = Uri.parse("http://google.com");?2. Intent it = new Intent(Intent.ACTION_VIEW, uri);?3. startActivity(it);?
显示地图?1. Uri uri = Uri.parse("geo:38.899533,-77.036476");?2. Intent it = new Intent(Intent.ACTION_VIEW, uri);?3. startActivity(it);?4. //其他 geo URI 範例?5. //geo:latitude,longitude?6. //geo:latitude,longitude?z=zoom?7. //geo:0,0?q=my+street+address?8. //geo:0,0?q=business+near+city?9. //google.streetview:cbll=lat,lng&cbp=1,yaw,,pitch,zoom&mz=mapZoom?
路 径规划?1. Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat startLng&daddr=endLat endLng&hl=en");?2. Intent it = new Intent(Intent.ACTION_VIEW, uri);?3. startActivity(it);?4. //where startLat, startLng, endLat, endLng are a long with 6 decimals like: 50.123456?
打 电话?1. //叫出拨号程序?2. Uri uri = Uri.parse("tel:0800000123");?3. Intent it = new Intent(Intent.ACTION_DIAL, uri);?4. startActivity(it);?1. //直接打电话出去?2. Uri uri = Uri.parse("tel:0800000123");?3. Intent it = new Intent(Intent.ACTION_CALL, uri);?4. startActivity(it);?5. //用這個，要在 AndroidManifest.xml 中，加上?6. //<uses-permission id="android.permission.CALL_PHONE" />?传 送SMS/MMS?1. //调用短信程序?2. Intent it = new Intent(Intent.ACTION_VIEW, uri);?3. it.putExtra("sms_body", "The SMS text");?4. it.setType("vnd.android-dir/mms-sms");?5. startActivity(it);?1. //传送消息?2. Uri uri = Uri.parse("smsto://0800000123");?3. Intent it = new Intent(Intent.ACTION_SENDTO, uri);?4. it.putExtra("sms_body", "The SMS text");?5. startActivity(it);?1. //传送 MMS?2. Uri uri = Uri.parse("content://media/external/images/media/23");?3. Intent it = new Intent(Intent.ACTION_SEND);?4. it.putExtra("sms_body", "some text");?5. it.putExtra(Intent.EXTRA_STREAM, uri);?6. it.setType("image/png");?7. startActivity(it);?
传 送 Email?1. Uri uri = Uri.parse("mailto:xxx@abc.com");?2. Intent it = new Intent(Intent.ACTION_SENDTO, uri);?3. startActivity(it);?1. Intent it = new Intent(Intent.ACTION_SEND);?2. it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");?3. it.putExtra(Intent.EXTRA_TEXT, "The email body text");?4. it.setType("text/plain");?5. startActivity(Intent.createChooser(it, "Choose Email Client"));?1. Intent it=new Intent(Intent.ACTION_SEND);?2. String[] tos={"me@abc.com"};?3. String[] ccs={"you@abc.com"};?4. it.putExtra(Intent.EXTRA_EMAIL, tos);?5. it.putExtra(Intent.EXTRA_CC, ccs);?6. it.putExtra(Intent.EXTRA_TEXT, "The email body text");?7. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");?8. it.setType("message/rfc822");?9. startActivity(Intent.createChooser(it, "Choose Email Client"));?1. //传送附件?2. Intent it = new Intent(Intent.ACTION_SEND);?3. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");?4. it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");?5. sendIntent.setType("audio/mp3");?6. startActivity(Intent.createChooser(it, "Choose Email Client"));?
播 放多媒体?Uri uri = Uri.parse("file:///sdcard/song.mp3");?Intent it = new Intent(Intent.ACTION_VIEW, uri);?it.setType("audio/mp3");?startActivity(it);?Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");?Intent it = new Intent(Intent.ACTION_VIEW, uri);?startActivity(it);?
Market 相关?1. //寻找某个应用?2. Uri uri = Uri.parse("market://search?q=pname:pkg_name");?3. Intent it = new Intent(Intent.ACTION_VIEW, uri);?4. startActivity(it);?5. //where pkg_name is the full package path for an application?1. //显示某个应用的相关信息?2. Uri uri = Uri.parse("market://details?id=app_id");?3. Intent it = new Intent(Intent.ACTION_VIEW, uri);?4. startActivity(it);?5. //where app_id is the application ID, find the ID?6. //by clicking on your application on Market home?7. //page, and notice the ID from the address bar?
Uninstall 应用程序?1. Uri uri = Uri.fromParts("package", strPackageName, null);?2. Intent it = new Intent(Intent.ACTION_DELETE, uri);?3. startActivity(it);?
===============================================================================?1 调用浏览器 载入某网址view plaincopy to clipboardprint?Uri uri = Uri.parse("http://www.baidu.com");?Intent it = new Intent(Intent.ACTION_VIEW, uri);?startActivity(it);?
2 Broadcast接收系统广播的intent 监控应用程序包的安装 删除view plaincopy to clipboardprint?public class getBroadcast extends BroadcastReceiver {?@Override?public void onReceive(Context context, Intent intent) {?if(Intent.ACTION_PACKAGE_ADDED.equals(intent.getAction())){?Toast.makeText(context, "有应用被添加", Toast.LENGTH_LONG).show();?}?else if(Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())){?Toast.makeText(context, "有应用被删除", Toast.LENGTH_LONG).show();?}?else if(Intent.ACTION_PACKAGE_REPLACED.equals(intent.getAction())){?Toast.makeText(context, "有应用被替换", Toast.LENGTH_LONG).show();?}?else if(Intent.ACTION_CAMERA_BUTTON.equals(intent.getAction())){?Toast.makeText(context, "按键", Toast.LENGTH_LONG).show();?}?}?}?需要声明的权限如下AndroidManifest.xmlview plaincopy to clipboardprint?<?xml version="1.0" encoding="utf-8"?>?<manifest xmlns:android="http://schemas.android.com/apk/res/android"?package="zy.Broadcast"?android:versionCode="1"?android:versionName="1.0">?<application android:icon="@drawable/icon" android:label="@string/app_name">?<activity android:name=".Broadcast"?android:label="@string/app_name">?<intent-filter>?<action android:name="android.intent.action.MAIN" />?<category android:name="android.intent.category.LAUNCHER" />?</intent-filter>?</activity>?<receiver android:name="getBroadcast" android:enabled="true" >?<intent-filter>?<action android:name="android.intent.action.PACKAGE_ADDED"></action>?<!-- <action android:name="android.intent.action.PACKAGE_CHANGED"></action>-->?<action android:name="android.intent.action.PACKAGE_REMOVED"></action>?<action android:name="android.intent.action.PACKAGE_REPLACED"></action>?<!-- <action android:name="android.intent.action.PACKAGE_RESTARTED"></action>-->?<!-- <action android:name="android.intent.action.PACKAGE_INSTALL"></action>-->?<action android:name="android.intent.action.CAMERA_BUTTON"></action>?<data android:scheme="package"></data>?</intent-filter>?</receiver>?</application>?<uses-sdk android:minSdkVersion="3" />?</manifest>?
3 使用Toast输出一个字符串view plaincopy to clipboardprint?public void DisplayToast(String str)?{?Toast.makeText(this,str,Toast.LENGTH_SHORT).show();?}?
4 把一个字符串写进文件view plaincopy to clipboardprint?public void writefile(String str,String path )?{?File file;?FileOutputStream out;?try {?//创建文件?file = new File(path);?file.createNewFile();?//打开文件file的OutputStream?out = new FileOutputStream(file);?String infoToWrite = str;?//将字符串转换成byte数组写入文件?out.write(infoToWrite.getBytes());?//关闭文件file的OutputStream?out.close();?} catch (IOException e) {?//将出错信息打印到Logcat?DisplayToast(e.toString());?}?}?
5 把文件内容读出到一个字符串view plaincopy to clipboardprint?public String getinfo(String path)?{?File file;?String str="";?FileInputStream in;?try{?//打开文件file的InputStream?file = new File(path);?in = new FileInputStream(file);?//将文件内容全部读入到byte数组?int length = (int)file.length();?byte[] temp = new byte[length];?in.read(temp, 0, length);?//将byte数组用UTF-8编码并存入display字符串中?str = EncodingUtils.getString(temp,TEXT_ENCODING);?//关闭文件file的InputStream?in.close();?}?catch (IOException e) {?DisplayToast(e.toString());?}?return str;?}?
6 调用Android installer 安装和卸载程序view plaincopy to clipboardprint?Intent intent = new Intent(Intent.ACTION_VIEW);?intent.setDataAndType(Uri.fromFile(new File("/sdcard/WorldCupTimer.apk")), "application/vnd.android.package-archive");?startActivity(intent); //安装 程序?Uri packageURI = Uri.parse("package:zy.dnh");?Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);?startActivity(uninstallIntent);//正常卸载程序?
7 结束某个进程view plaincopy to clipboardprint?activityManager.restartPackage(packageName);?
8 设置默认来电铃声view plaincopy to clipboardprint?public void setMyRingtone()?{?File k = new File("/sdcard/Shall We Talk.mp3"); // 设置歌曲路径?ContentValues values = new ContentValues();?values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath());?values.put(MediaStore.MediaColumns.TITLE, "Shall We Talk");?values.put(MediaStore.MediaColumns.SIZE, 8474325);?values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3");?values.put(MediaStore.Audio.Media.ARTIST, "Madonna");?values.put(MediaStore.Audio.Media.DURATION, 230);?values.put(MediaStore.Audio.Media.IS_RINGTONE, true);?values.put(MediaStore.Audio.Media.IS_NOTIFICATION, false);?values.put(MediaStore.Audio.Media.IS_ALARM, false);?values.put(MediaStore.Audio.Media.IS_MUSIC, false);?// Insert it into the database?Uri uri = MediaStore.Audio.Media.getContentUriForPath(k.getAbsolutePath());?Uri newUri = this.getContentResolver().insert(uri, values);?RingtoneManager.setActualDefaultRingtoneUri(this, RingtoneManager.TYPE_RINGTONE, newUri);?;}?需要的权限view plaincopy to clipboardprint?<uses-permission android:name="android.permission.WRITE_SETTINGS"></uses-permission>
