转：Android 学习4

feiyang10086

转：Android 学习4

转载自：http://www.cnblogs.com/mengshu-l ... /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)



Java代码

1. 1.Intent intent = new Intent();   
   
2. 2.intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);   
   
3. 3.intent.setAction(android.content.intent.ACTION_VIEW);   
   
4. 4.FILE f = new File(apkFileName);   
   
5. 5.//need android.permission.INSTALL_PACKAGES   
   
6. 6.intent.setDataAndType(Uri.from(f),"application/vnd.android.package-archive");   
   
7. 7.startActivity(intent);  
   
8. Intent intent = new Intent();
   
9. intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
   
10. intent.setAction(android.content.intent.ACTION_VIEW);
    
11. FILE f = new File(apkFileName);
    
12. //need android.permission.INSTALL_PACKAGES
    
13. intent.setDataAndType(Uri.from(f),"application/vnd.android.package-archive");
    
14. startActivity(intent);  

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卸载程序



Java代码

1. 1.Uri packageURI = Uri.parse("package:com.android.myapp");        
   
2. 2.Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);        
   
3. 3.startActivity(uninstallIntent);  
   
4. Uri packageURI = Uri.parse("package:com.android.myapp");     
   
5. Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);     
   
6. startActivity(uninstallIntent);

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2 判断设备是否有存储卡



Java代码

1. 1.import static android.os.Environment.*;  
   
2. import static android.os.Environment.*;
   
3. Java代码  
   
4. 1.<SPAN style="BACKGROUND-COLOR: #ffffff; WHITE-SPACE: normal"> <SPAN style="BACKGROUND-COLOR: #fafafa; WHITE-SPACE: pre">boolean existSDCard = false;</SPAN></SPAN>  
   
5. boolean existSDCard = false;Java代码  
   
6. 1.if(getExternalStorageState().equals(MEDIA_MOUNTED))   
   
7. 2.     existSDCard = true;  
   
8. if(getExternalStorageState().equals(MEDIA_MOUNTED))
   
9.      existSDCard = true; 3 全屏显示

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Java代码

1. 1.//必须在setContentView之前调用全屏显示   
   
2. 2.requestWindowFeature(Window.FEATURE_NO_TITLE);   
   
3. 3.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,   
   
4. 4.WindowManager.LayoutParams.FLAG_FULLSCREEN);  
   
5. //必须在setContentView之前调用全屏显示
   
6. requestWindowFeature(Window.FEATURE_NO_TITLE);
   
7. getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
   
8. WindowManager.LayoutParams.FLAG_FULLSCREEN);
   
9. setContentView(R.layout.main);

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