安装apk出现Parse error when parsing manifest. Discontinuing installation.解决方案

问题：

进行apk安装的时候，老是出现“Parse error when parsing manifest. Discontinuing installation.”错误。

分析缘由：

安装权限不够，须要申请：

一、<uses-permission android:name="android.permission.INSTALL_PACKAGES" />

二、须要安装的apk文件的777（-rwxrwxrwx）权限。正常下载下来的apk为“-rw-------”权限，安装须要“-rwxrwxrwx”权限；

三、须要安装apk所在目录的777（-rwxrwxrwx）权限。

解决方案：

//获取文件夹路径
private String getFolderPath(String filePath) {
    String folderPath = filePath;
    int pos = filePath.lastIndexOf("/");
    if (pos != -1) {
        folderPath = filePath.substring(0, pos);
    }
    return folderPath;
}
//安装 apk
public boolean installApk(String fileName) {
    Log.d("test", fileName);
    //fileName = "/sdcard/xxx.apk";
    try {
        String strPath = getFolderPath(fileName);
        String cmd = "chmod 777 " + strPath;
        Runtime runtime = Runtime.getRuntime();
        Process proc = runtime.exec(cmd);
    } catch (IOException e) {
        // TODO Auto-generated catch block1
        e.printStackTrace();
    }//.getContext()
    try {
        String cmd = "chmod 777 " + fileName;
        Runtime runtime = Runtime.getRuntime();
        Process proc = runtime.exec(cmd);
    } catch (IOException e) {
        // TODO Auto-generated catch block1
        e.printStackTrace();
    }//.getContext()
    Context context = getContext();
    File apk = new File(fileName);
    if (apk.exists()) {
        Uri uri = Uri.fromFile(apk);
        Intent intent = new Intent(Intent.ACTION_VIEW);
        //intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setDataAndType(uri,
                "application/vnd.android.package-archive");
        context.startActivity(intent);
        return true;
    }
    return false;
}