静默安装，不稳定，是为何？

[中才德创]

核心代码就是下面两行：
机器拥有root权限，升级时，有时正常升上去了，有时黑屏。
String cmd = "pm install -r " + filePath;
Runtime.getRuntime().exec(cmd);

/**
 * install slient
 * @param filePath
 * @return 0 file not exist , 1 success , -1 other exception error
 */
private int installSlient(String filePath) {
	try {
		if (filePath==null || filePath.length()==0) {
			return 0;
		}
		
		File file = new File(filePath);
		if (!file.exists() || !file.isFile()  || file.length()<=0 ) {
			return 0;
		}
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
		return -1;
	}
	
	try {
		String cmd = "pm install -r " + filePath;
		Runtime.getRuntime().exec(cmd);
	} catch (IOException e1) {
		// TODO Auto-generated catch block
		e1.printStackTrace();
		return -2;
	}

	return 1;
}

/**
 * install slient
 * @param filePath
 * @return 0 file not exist , 1 success , -1 other exception error
 */
private int installNoSilent(String filePath) {
	try {
		if (filePath==null || filePath.length()==0) {
			return 0;
		}
		
		File file = new File(filePath);
		if (!file.exists() || !file.isFile()  || file.length()<=0 ) {
			return 0;
		}
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
		return -1;
	}
	
	try {
		Intent intent = new Intent(Intent.ACTION_VIEW);
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		intent.setDataAndType(Uri.parse("file://" + filePath),
				"application/vnd.android.package-archive");
		this.context.startActivity(intent);
	} catch (Exception e1) {
		// TODO Auto-generated catch block
		e1.printStackTrace();
		return -2;
	}

	return 1;
}

[中才德创]

将安装的程序，放在主线程里运行，执行了安装命令后，主线程休眠一段时间。卡死在2~3间，现在设置3秒，未必reboot肯定执行。延时reboot，又无法做到。

/**
	 * install apk
	 */
	public void installApk() {
		//new installApkThread().start();
		if ((downLoadStorageFileDir!=null) && (apkName!=null)) {
			String filePath = downLoadStorageFileDir + File.separatorChar + apkName;
			AvcLog.printW(TAG, "start install apk : " + filePath);
			int iRet = installSlientEx(filePath);
			AvcLog.printW(TAG, "finish install apk, reboot : the result is " + iRet);
			AvcApp.the().getCore().onReboot();
		} else {
			AvcLog.printW(TAG, "installApkThread : path is null");
		}
	}

/**
	 * install slient
	 * @param filePath
	 * @return 0 file not exist , 1 success , -1 other exception error
	 */
	private int installSlientEx(String filePath) {
		try {
			if (filePath==null || filePath.length()==0) {
				return 0;
			}
			
			File file = new File(filePath);
			if (!file.exists() || !file.isFile()  || file.length()<=0 ) {
				return 0;
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return -1;
		}
		
		Process proc = null;
		try {
			String cmd = "pm install -r " + filePath;
			Runtime runtime = Runtime.getRuntime();
			AvcLog.printW(TAG, "post cmd : " + filePath);
			proc = runtime.exec(cmd);
			Thread.sleep(3000);
		} catch (Exception e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
			return -2;
		} finally {
			if (proc != null) {
				proc.destroy();
			}
		}

		return 1;
	}

[小马哥_3276]

pm install命令有时候会报错，可以参考这个博客，可以完美解决这个问题 http://blog.csdn.net/mtx_03/article/details/69388208