android 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
2010-04-27 12:09

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%20startLng&daddr=endLat%20endLng&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.xml view 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>