apk安装器

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <EditText 
        android:hint="请输入安装apk文件的路径"
         android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_path"
        />
    <Button
        android:onClick="click"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="安装" />

</RelativeLayout>

package com.itheima.apkinstaller;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
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();
		//安装apk
//        <intent-filter>
//        <action android:name="android.intent.action.VIEW" />
//        <category android:name="android.intent.category.DEFAULT" />
//        <data android:scheme="content" />
//        <data android:scheme="file" />
//        <data android:mimeType="application/vnd.android.package-archive" />
//    </intent-filter>
		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);
	}
}