Intent 界面跳转和传值

第一个页面布局:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">


<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/button122"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="第一种" />

    <Button
        android:id="@+id/button123"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="第二种"/>

    <TextView
        android:id="@+id/textviewaa"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:hint="内容"/>

</LinearLayout>

</android.support.constraint.ConstraintLayout>

第一个界面实现:
package com.example.xiaojie.paomadeng;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

/**
 * Created by xiaojie on 2017/11/15.
 */

public class FActivity extends Activity {

    private TextView textV;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.fayout);


        Button btn = (Button) findViewById(R.id.button122);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Intent intent = new Intent(FActivity.this, TActivity.class);

                FActivity.this.startActivity(intent);

            }
        });



        Button btn1 = (Button) findViewById(R.id.button123);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Intent intent = new Intent(FActivity.this, TActivity.class);

                startActivityForResult(intent,1);

            }
        });


        textV = (TextView)findViewById(R.id.textviewaa);




    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        Log.i("tag", "onActivityResult: dddd");

        Log.i("tag", "onActivityResult: requestCode:" + requestCode);


        Log.i("tag", "onActivityResult: resultCode" + resultCode);


        Log.i("tag", "onActivityResult: data" + data.getStringExtra("name"));

        String content = data.getStringExtra("name");

        textV.setText(content);

    }
}

第二个页面布局:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">


    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <Button
            android:id="@+id/huichuan"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="回传"/>


        <TextView
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:hint="回传内容"/>
        

    </LinearLayout>

</android.support.constraint.ConstraintLayout>

第二个实现
package com.example.xiaojie.paomadeng;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.View;
import android.widget.Button;

/**
 * Created by xiaojie on 2017/11/15.
 */

public class TActivity extends Activity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.tlayout);


        Button btn1 = (Button) findViewById(R.id.huichuan);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Intent data = new Intent();

                data.putExtra("name", "Mr.H");

                setResult(100, data);

                finish();

            }
        });


    }


}

效果图:

Untitled.gif