image.png
核心部分
启动一个app，主要是通过startActivity打开对应的包：
PackageManager packageManager = getPackageManager();
Intent intent = packageManager.getLaunchIntentForPackage("com.exmple.helloapp");
// intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
通过packageManager 获取包的信息。必须保证包已经安装过了。
实战代码
MainActivity.java:
package com.exmple.startapp;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
/**
* @author Lee
*/
public class MainActivity extends AppCompatActivity {
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button)findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
PackageManager packageManager = getPackageManager();
Intent intent = packageManager.getLaunchIntentForPackage("com.exmple.helloapp");
// intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
});
}
}
