将andriod应用安装为系统应用

package com.example.bnoainstaller;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends ActionBarActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
		hasRoot();
		setContentView(R.layout.activity_main);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	
	private void hasRoot() {
		int i = execRootCmdSilent("echo test"); // 通过执行测试命令来检测
		Log.e("BNOAInstaller", "in hasRoot method, i is : " + i);
		if (i != -1) {
			if(this.checkAppExists()) {
				appExistsHandler();
			} else {
				installApp();
			}
		} else {
			hasNoRootPrivilegesHandler();
		}
	}
	
    // 执行linux命令但不关注结果输出
	protected static int execRootCmdSilent(String paramString) {
		try {
			Process localProcess = Runtime.getRuntime().exec("su");
			Object localObject = localProcess.getOutputStream();
			DataOutputStream localDataOutputStream = new DataOutputStream(
					(OutputStream) localObject);
			String str = String.valueOf(paramString);
			localObject = str + "\n";
			localDataOutputStream.writeBytes((String) localObject);
			localDataOutputStream.flush();
			localDataOutputStream.writeBytes("exit\n");
			localDataOutputStream.flush();
			localProcess.waitFor();
			int result = localProcess.exitValue();
			return (Integer) result;
		} catch (Exception localException) {
			localException.printStackTrace();
			return -1;
		}
	}
	
	private void hasNoRootPrivilegesHandler() {
		AlertDialog.Builder builder = new Builder(MainActivity.this);
		builder.setTitle("提示");
		builder.setMessage("您没有获得root权限");
		builder.setPositiveButton("确认", new OnClickListener() {
			@Override
	        public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				MainActivity.this.finish();
			}
	    });
		builder.show();
	}
	
	private void installApp() {
		try {
			copyApp2SDCard("bnoa.apk");
			Log.e("BNOAInstaller", "Copy app file to sdcard successfully");
			copyApp2SystemAppDir();
			afterInstalling();
		} catch (Exception e) {
			e.printStackTrace();
			Log.e("BNOAInstaller", e.getMessage());
			Log.e("BNOAInstaller", "Copy file failed");
			installFailed();
		}
	}
	
	private void afterInstalling() {
		AlertDialog.Builder builder = new Builder(MainActivity.this);
		builder.setMessage("安装程序已将<应用>安装到您的手机了,但需要重启手机，应用才可以使用。是否重启？");
		builder.setTitle("提示");
//		builder.setNegativeButton("取消", new OnClickListener() {
//			@Override
//			public void onClick(DialogInterface dialog, int arg1) {
//				dialog.dismiss();
//			    MainActivity.this.finish();
//			}
//		});
		builder.setPositiveButton("重启", new OnClickListener() {
			@Override
	        public void onClick(DialogInterface dialog, int which) {
				rebootDevice();
			}
	    });
		builder.show();
	}
	
	private void installFailed() {
		AlertDialog.Builder builder = new Builder(MainActivity.this);
		builder.setTitle("提示");
		builder.setMessage("安装应用<应用>出错");
		builder.setPositiveButton("确认", new OnClickListener() {
			@Override
	        public void onClick(DialogInterface dialog, int which) {
			    dialog.dismiss();
			    MainActivity.this.finish();
			}
	    });
		builder.show();
	}
	
	private void copyApp2SDCard(String fileName) throws Exception {
		Log.e("BNOAInstaller", "In copy app to system directory");
		// 获取assets下的数据库文件流  
        InputStream is = this.getBaseContext().getAssets().open(fileName);  
        // 获取应用包名  
        String appPath = new File("/sdcard").getAbsolutePath() + "/" + fileName;  
        Log.e("BNOAInstaller", "Create file in sdcard success");
        File app = new File(appPath);  
        
        Log.e("BNOAInstaller", "after create file : " + appPath);
        
        if (app.exists()) {  
        	app.delete();  
        }  
        
        app.createNewFile();  
        
        Log.e("BNOAInstaller", "Create file bnoa.apk in sdcard, file path: " + appPath);
        
        FileOutputStream fos = new FileOutputStream(app, true);  
        
        Log.e("BNOAInstaller", "After create output stream of fos");
  
        byte[] buffer = new byte[1024];  
        int count = 0;  
        while ((count = is.read(buffer)) != -1) {  
            fos.write(buffer, 0, count);
        }  
        
        Log.e("BNOAInstaller", "Write bnoa.apk to sdcard complete");
        
        app = null;  
        fos.close();
        is.close(); 
	}
	
	private void copyApp2SystemAppDir() throws Exception {
		Log.e("BNOAInstaller", "In copyApp2SystemAppDir()...");
//		String rwCommand = "mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system\n";
		String rwCommand = "mount -o remount,rw /system\n";
//		String copyCommand = "cat /sdcard/bnoa.apk > /system/app/bnoa.apk\n";
		String copyCommand = "cat /sdcard/bnoa.apk > /system/app/bnoa.apk\n";
		/**
		 * 下面的chmod64Command命令非常重要，如果没有
		 * 这句命令，那么有的手机在bnoa.apk复制到/system/app下后，经过重启，
		 * 应用图标也不会在屏幕上出现,应用本身也不会在系统后台运行。
		 * chmod 是给应用设置访问权限的 ,是linux的权限设置命令:
		 * chod 664: -rw-r--r-- (644) 只有属主有读写权限；而属组用户和其他用户只有读权限。
		 */
		String chmod64Command = "chmod 644 /system/app/bnoa.apk\n";
		String rmAppFileCommand = "rm /sdcard/bnoa.apk\n";//删除sd卡上的APP文件
//		String roCommand = "mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system\n";
		String roCommand = "mount -o remount,ro /system\n";
//		String lsCommand = "ls /system/app";
		
		Process proc = Runtime.getRuntime().exec("su");  
		Log.e("BNOAInstaller", "After command: su");
        DataOutputStream os = new DataOutputStream(proc.getOutputStream());  
        os.writeBytes(rwCommand);  
       Log.e("BNOAInstaller", "After command: mount -o remount,rw /system");
       os.writeBytes(copyCommand);  
       Log.e("BNOAInstaller", "After command: cat /sdcard/bnoa.apk > /system/app/bnoa.apk");
        os.writeBytes(chmod64Command);
        Log.e("BNOAInstaller", "After command: chmod 644 /system/app/bnoa.apk");
       os.writeBytes(rmAppFileCommand);
       Log.e("BNOAInstaller", "After command: rm /sdcard/bnoa.apk");
        os.writeBytes(roCommand);
        Log.e("BNOAInstaller", "After command: mount -o remount,ro /system");
        os.writeBytes("exit\n");
       Log.e("BNOAInstaller", "After command: exit");
        os.flush();  
		proc.waitFor();
	}

	private boolean checkAppExists() {
		try {
//			StringBuffer outputInfo = new StringBuffer();
			Process proc = Runtime.getRuntime().exec("ls /system/app");  
	        proc.waitFor();
			BufferedReader reader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
	        String appName = "";     
		    while ((appName = reader.readLine())!= null) {
//		    	outputInfo.append(appName + "\n");
//		    	Log.e("BNOAInstaller_readLine: ", appName);
		    	appName = appName.trim();
		    	if(appName.equals("bnoa.apk")) {
		    		return true;
		    	}
		    }
		} catch (Exception e) {
			e.printStackTrace();
			Log.e("BNOAInstaller", e.getMessage());
		}
		
		return false;
	}
	
	private void appExistsHandler() {
		AlertDialog.Builder builder = new Builder(MainActivity.this);
		builder.setTitle("提示");
		builder.setMessage("版纳OA移动端已安装，是否卸载?");
		builder.setNegativeButton("取消", new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				MainActivity.this.finish();
			}
		});
		builder.setPositiveButton("残忍卸载", new OnClickListener() {
			@Override
	        public void onClick(DialogInterface dialog, int which) {
				uninstallApp();
			}
	    });
		builder.show();
	}
	
	private void uninstallApp() {
		try {
//			String rwCommand = "mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system\n";
			String rwCommand = "mount -o remount,rw /system\n";
			String rmCommand = "rm /system/app/bnoa.apk\n";
			String rmDataCommand = "rm -r /data/data/com.eruipan.bnoaapp\n";//删除已用生成的数据
//			String roCommand = "mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system\n";
			String roCommand = "mount -o remount,ro /system\n";
			Process proc = Runtime.getRuntime().exec("su");  
	        DataOutputStream os = new DataOutputStream(proc.getOutputStream());  
	        os.writeBytes(rwCommand);  
	        os.writeBytes(rmCommand); 
	        os.writeBytes(rmDataCommand);
	        os.writeBytes(roCommand); 
	        os.writeBytes("exit\n");
	        os.flush();  
			proc.waitFor();
			uninstallAppOverHandler();
		} catch (Exception e) {
			Log.e("BNOAInstaller", e.getMessage());
			uninstallAppFail();
		}
	}
	
	private void uninstallAppOverHandler() {
		AlertDialog.Builder builder = new Builder(MainActivity.this);
		builder.setTitle("提示");
		builder.setMessage("卸载完成");
		builder.setPositiveButton("确认", new OnClickListener() {
			@Override
	        public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				MainActivity.this.finish();
			}
	    });
		builder.show();
	}

	private void uninstallAppFail() {
		AlertDialog.Builder builder = new Builder(MainActivity.this);
		builder.setTitle("提示");
		builder.setMessage("卸载出错");
		builder.setPositiveButton("确认", new OnClickListener() {
			@Override
	        public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				MainActivity.this.finish();
			}
	    });
		builder.show();
	}
	
	private void rebootDevice() {
		try{
		    Process proc = Runtime.getRuntime().exec("su");
		    DataOutputStream os = new DataOutputStream(proc.getOutputStream());  
	        os.writeBytes("reboot\n");
	        os.writeBytes("exit\n");
		    os.flush();
		}catch(Exception e) {
			Log.e("BNOAInstaller", "reboot device exception : " + e.getMessage());
		}
	}
	
}