转：Android 学习四

转：Android 学习4

转载自：http://www.cnblogs.com/mengshu-lbq/archive/2010/08/27/1810271.html

1 打开内置的APK Installer来安装APK(需要将Application Setting中的Unknown sources打开)

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Intent intent = new Intent();intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setAction(android.content.intent.ACTION_VIEW);FILE f = new File(apkFileName);//need android.permission.INSTALL_PACKAGESintent.setDataAndType(Uri.from(f),"application/vnd.android.package-archive");startActivity(intent);

卸载程序

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Uri packageURI = Uri.parse("package:com.android.myapp");     Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);     startActivity(uninstallIntent);

?2 判断设备是否有存储卡

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import static android.os.Environment.*;

?boolean existSDCard = false;

if(getExternalStorageState().equals(MEDIA_MOUNTED))     existSDCard = true;

?3 全屏显示

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//必须在setContentView之前调用全屏显示requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

?setContentView(R.layout.main);