安装apk程序进android

package com.example.installmyapk;

import java.io.File;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {
private EditText et_path;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

et_path = (EditText) findViewById(R.id.et_path);
}

public void click(View view){
String path = et_path.getText().toString().trim();

Intent intent = new Intent();
intent.setAction("android.intent.action.VIEW");
intent.addCategory("android.intent.category.DEFAULT");

intent.setDataAndType(Uri.fromFile(new File(path)), "application/vnd.android.package-archive");
startActivity(intent);
}

}