startActivityForResult()回传值跳转

//第一个activity

package bwei.com.startactivityforresult;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void tiao(View view) {
        Intent  intent=new Intent(MainActivity.this,Main2Activity.class);

        startActivityForResult(intent,1);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(requestCode==1&&resultCode==1){
            String text = data.getStringExtra("text");
            Toast.makeText(MainActivity.this,text,Toast.LENGTH_SHORT).show();
        }
    }
}

//第二个activity

package bwei.com.startactivityforresult;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        TextView edit = findViewById(R.id.edit);
        Intent intent = getIntent();
        intent.putExtra("text", edit.getText().toString());
        setResult(1, intent);
        finish();
    }
}