onNewIntent使用的业务场景

实际开发中通常首页的启动模式都会设为singleTask,当其他栈又回到首页时，此时就会调用onNewIntent方法，此时可根据具体的业务场景使用它。
实例

public class MainActivity extends AppCompatActivity {
    private TextView textview;
    private static final int REQUEST_CODE=1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.bt).setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this,ThreeActivity.class));
//                startActivityForResult(new Intent(MainActivity.this,
//                        SecondActivity.class), REQUEST_CODE);
            }
        });
        textview = (TextView) findViewById(R.id.textview);
    }

    @Override
    protected void onNewIntent(final Intent intent) {
        super.onNewIntent(intent);
        Log.e("1","我是three的回调");
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
            String s = data.getStringExtra("bian");
            textview.setText(s);
        }
    }
}

ThreeActivity

public class ThreeActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_three);
        startActivity(new Intent(ThreeActivity.this,MainActivity.class));
    }
}