Android 在应用中启动其他应用

直接上代码

public class MainActivity extends Activity {    public static MainActivity context;    private String packageName="com.test.hehe";    private String className="com.test.hehe.MainActivity";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        context=this;        Intent startIntent=new Intent(Intent.ACTION_MAIN);        startIntent.addCategory(Intent.CATEGORY_LAUNCHER);        ComponentName cn = new ComponentName(packageName, className);          startIntent.setComponent(cn);        startActivity(startIntent);        finish();    }}