Android 在app里面打开另一个app

 

一、方式1：打开外部app，在新窗口打开。

    //打开外部app，新窗口打开
    private void doStartApplicationWithPackageName(String packagename) {
        // 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等
        PackageInfo packageinfo = null;
        try {
            packageinfo = getPackageManager().getPackageInfo(packagename, 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        if (packageinfo == null) {
            //BDToast.showToast(getText(R.string.app_not_found).toString());
            Toast.makeText(getApplicationContext(), "app_not_found", Toast.LENGTH_SHORT).show();
            return;
        }
        else
            Toast.makeText(getApplicationContext(), "open successfully", Toast.LENGTH_SHORT).show();

        Intent resolveIntent = getPackageManager().getLaunchIntentForPackage(packagename);// 这里的packname就是从上面得到的目标apk的包名
        startActivity(resolveIntent);// 启动目标应用
    }

二、方式2：打开外部app，嵌入旧窗口中。

//打开外部app，嵌入旧窗口中
    private void doStartApplicationWithPackageNameE(String packagename) {
        // 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等
        PackageInfo packageinfo = null;
        try {
            packageinfo = getPackageManager().getPackageInfo(packagename, 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        if (packageinfo == null) {
            Toast.makeText(getApplicationContext(), "app_not_found", Toast.LENGTH_SHORT).show();
            return;
        } else
            Toast.makeText(getApplicationContext(), "open successfully", Toast.LENGTH_SHORT).show();

        // 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent
        Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
        resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        resolveIntent.setPackage(packageinfo.packageName);

        // 通过getPackageManager()的queryIntentActivities方法遍历
List<ResolveInfo> resolveinfoList = getPackageManager()
                .queryIntentActivities(resolveIntent, 0);

        ResolveInfo resolveinfo = resolveinfoList.iterator().next();
        if (resolveinfo != null) {
            // packagename = 参数packname
            String packageName = resolveinfo.activityInfo.packageName;
            // 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式：packagename.mainActivityname]
            String className = resolveinfo.activityInfo.name;
            // LAUNCHER Intent
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);

            // 设置ComponentName参数1:packagename参数2:MainActivity路径
            ComponentName cn = new ComponentName(packageName, className);

            intent.setComponent(cn);
            startActivity(intent);
        }
    }

三、测试

        1、java源码

package com.example.lancher_demo;

import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //
        findViewById(R.id.btn_custom_property).setOnClickListener(this);
        findViewById(R.id.btn_StartApplication).setOnClickListener(this);

    }
    //打开外部app，嵌入旧窗口中
    private void doStartApplicationWithPackageNameE(String packagename) {
        // 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等
        PackageInfo packageinfo = null;
        try {
            packageinfo = getPackageManager().getPackageInfo(packagename, 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        if (packageinfo == null) {
            Toast.makeText(getApplicationContext(), "app_not_found", Toast.LENGTH_SHORT).show();
            return;
        } else
            Toast.makeText(getApplicationContext(), "open successfully", Toast.LENGTH_SHORT).show();

        // 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent
        Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
        resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        resolveIntent.setPackage(packageinfo.packageName);

        // 通过getPackageManager()的queryIntentActivities方法遍历
 List<ResolveInfo> resolveinfoList = getPackageManager()
                .queryIntentActivities(resolveIntent, 0);

        ResolveInfo resolveinfo = resolveinfoList.iterator().next();
        if (resolveinfo != null) {
            // packagename = 参数packname
            String packageName = resolveinfo.activityInfo.packageName;
            // 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式：packagename.mainActivityname]
            String className = resolveinfo.activityInfo.name;
            // LAUNCHER Intent
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);

            // 设置ComponentName参数1:packagename参数2:MainActivity路径
            ComponentName cn = new ComponentName(packageName, className);

            intent.setComponent(cn);
            startActivity(intent);
        }
    }
    //打开外部app，新窗口打开
    private void doStartApplicationWithPackageName(String packagename) {
        // 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等
        PackageInfo packageinfo = null;
        try {
            packageinfo = getPackageManager().getPackageInfo(packagename, 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        if (packageinfo == null) {
            //BDToast.showToast(getText(R.string.app_not_found).toString());
            Toast.makeText(getApplicationContext(), "app_not_found", Toast.LENGTH_SHORT).show();
            return;
        }
        else
            Toast.makeText(getApplicationContext(), "open successfully", Toast.LENGTH_SHORT).show();

        Intent resolveIntent = getPackageManager().getLaunchIntentForPackage(packagename);// 这里的packname就是从上面得到的目标apk的包名
        startActivity(resolveIntent);// 启动目标应用
    }

    @Override
    public void onClick(View view) {
        if (view.getId() == R.id.btn_custom_property) {
            //doStartApplicationWithPackageName("com.android.calculator2");
            doStartApplicationWithPackageNameE("com.google.android.deskclock");
         }else if (view.getId() == R.id.btn_StartApplication) {
            doStartApplicationWithPackageName("com.android.calculator2");
        }
    }
}

        2、测试运行效果