Android 常用代码集合.doc

这篇文章主要记录一些我常用的一些代码段，方便以后查阅，不断更新中1 调用浏览器 载入某网址01.Uri uri = Uri.parse(); 02.Intent it = new Intent(Intent.ACTION_VIEW, uri); 03.startActivity(it); Uri uri = Uri.parse(); 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01.public class getBroadcast extends BroadcastReceiver 02. Override 03. public void onReceive(Context context, Intent intent) 04. 05. if(Intent.ACTION_PACKAGE_ADDED.equals(intent.getAction() 06. Toast.makeText(context, 有应用被添加, Toast.LENGTH_LONG).show(); 07. 08. else if(Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction() 09. Toast.makeText(context, 有应用被删除, Toast.LENGTH_LONG).show(); 10. 11. 12. else if(Intent.ACTION_PACKAGE_REPLACED.equals(intent.getAction() 13. Toast.makeText(context, 有应用被替换, Toast.LENGTH_LONG).show(); 14. 15. 16. else if(Intent.ACTION_CAMERA_BUTTON.equals(intent.getAction() 17. Toast.makeText(context, 按键, Toast.LENGTH_LONG).show(); 18. 19. 20. 21. 22. 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.xml01. 02. 06. 07. 09. 10. 11. 12. 13. 14. 15. 16. 17. !- - 18. 19. 20. !- - 21. !- - 22. 23. 24. 25. 26. 27. 28. 29. !- - !- - !- - 3 使用Toast输出一个字符串01.public void DisplayToast(String str) 02. 03. Toast.makeText(this,str,Toast.LENGTH_SHORT).show(); 04. public void DisplayToast(String str) Toast.makeText(this,str,Toast.LENGTH_SHORT).show(); 4 把一个字符串写进文件01.public void writefile(String str,String path ) 02. 03. File file; 04. FileOutputStream out; 05. try 06. /创建文件 07. file = new File(path); 08. file.createNewFile(); 09. 10. /打开文件file的OutputStream 11. out = new FileOutputStream(file); 12. String infoToWrite = str; 13. /将字符串转换成byte数组写入文件 14. out.write(infoToWrite.getBytes(); 15. /关闭文件file的OutputStream 16. out.close(); 17. 18. 19. 20. catch (IOException e) 21. /将出错信息打印到Logcat 22. DisplayToast(e.toString(); 23. 24. 25. 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?01.public String getinfo(String path) 02. 03. File file; 04. String str=; 05. FileInputStream in; 06. try 07. /打开文件file的InputStream 08. file = new File(path); 09. in = new FileInputStream(file); 10. /将文件内容全部读入到byte数组 11. int length = (int)file.length(); 12. byte temp = new bytelength; 13. in.read(temp, 0, length); 14. /将byte数组用UTF-8编码并存入display字符串中 15. str = EncodingUtils.getString(temp,TEXT_ENCODING); 16. /关闭文件file的InputStream 17. 18. in.close(); 19. 20. catch (IOException e) 21. 22. DisplayToast(e.toString(); 23. 24. 25. return str; 26. 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 bytelength; 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?01.Intent intent = new Intent(Intent.ACTION_VIEW); 02. intent.setDataAndType(Uri.fromFile(new File(/sdcard/WorldCupTimer.apk), application/vnd.android.package-archive); 03. startActivity(intent); /安装 程序 04. 05. Uri packageURI = Uri.parse(package:zy.dnh); 06. Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI); 07. startActivity(uninstallIntent);/正常卸载程序 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?01.activityManager.restartPackage(packageName); activityManager.restartPackage(packageName); 8 设置默认来电铃声view plaincopy to clipboardprint?01.public void setMyRingtone() 02. 03. File k = new File(/sdcard/Shall We Talk.mp3); / 设置歌曲路径 04. ContentValues values = new ContentValues(); 05. values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath(); 06. values.put(MediaStore.MediaColumns.TITLE, Shall We Talk); 07. values.put(MediaStore.MediaColumns.SIZE, 8474325); 08. values.put(MediaStore.MediaColumns.MIME_TYPE, audio/mp3); 09. values.put(MediaStore.Audio.Media.ARTIST, Madonna); 10. values.put(MediaStore.Audio.Media.DURATION, 230); 11. values.put(MediaStore.Audio.Media.IS_RINGTONE, true); 12. values.put(MediaStore.Audio.Media.IS_NOTIFICATION, false); 13. values.put(MediaStore.Audio.Media.IS_ALARM, false); 14. values.put(MediaStore.Audio.Media.IS_MUSIC, false); 15. / Insert it into the database 16. Uri uri = MediaStore.Audio.Media.getContentUriForPath(k.getAbsolutePath(); 17. Uri newUri = this.getContentResolver().insert(uri, values); 18. RingtoneManager.setActualDefaultRingtoneUri(this, RingtoneManager.TYPE_RINGTONE, newUri); 19. ; 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, Ring