Android Intent页面跳转

Intent:协助完成各个组件之间的通讯
页面跳转：
1、startActivity（intent）:无返回值跳转
2、startActivityForResult(intent,requestCode):有返回值跳转
配合方法：
setResult(resultCode,data):跳转后的页面设置数据
onActivityResult(int requestCode,int resultCode,Intent data):跳转前页面得到数据

下面给出demo和效果图：

activity_main.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.three.MainActivity"
    tools:ignore="MergeRootFrame" >

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

        <CheckBox
            android:id="@+id/checkBox1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="@string/apple" />

        <CheckBox
            android:id="@+id/checkBox2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/banana" />

        <RadioGroup
            android:id="@+id/radioGroup1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <RadioButton
                android:id="@+id/radioButton1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:checked="true"
                android:text="@string/man" />

            <RadioButton
                android:id="@+id/radioButton2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/women" />
        </RadioGroup>

        <Button
            android:id="@+id/button1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/start" 
            />
         <Button
            android:id="@+id/button2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/start2" 
            />
    </LinearLayout>

</FrameLayout>

MainActivity.java

package com.example.three;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity implements
        android.widget.RadioGroup.OnCheckedChangeListener {

    private CheckBox cb;
    private RadioGroup rg;
    private Button button;

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

        cb = (CheckBox) findViewById(R.id.checkBox1);
        rg = (RadioGroup) findViewById(R.id.radioGroup1);
        button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, AAAActivity.class);
                MainActivity.this.startActivity(intent);

            }
        });
        Button button2 = (Button) findViewById(R.id.button2);
        
        button2.setOnClickListener(new OnClickListener() {
            

            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(MainActivity.this, BBBActivity.class);
                //请求码
                MainActivity.this.startActivityForResult(intent, 1);

            }
        });

        cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton button,
                    boolean isChecked) {
                if (isChecked) {
                    String text = button.getText().toString();
                    Toast.makeText(MainActivity.this, "男", Toast.LENGTH_SHORT)
                            .show();
                    Log.i("Tag", text);
                }

            }
        });
        rg.setOnCheckedChangeListener(this);
    }

    @Override
    public void onCheckedChanged(RadioGroup radioGroup, int radioId) {
        Log.i("1", "sdasdsa");
        switch (radioId) {
        case R.id.radioButton1:
            Toast.makeText(this, "男", Toast.LENGTH_SHORT).show();
            break;
        case R.id.radioButton2:
            Toast.makeText(this, "女", Toast.LENGTH_SHORT).show();
            break;
        default:
            break;

        }

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        if(requestCode==1&&resultCode==2){
            Toast.makeText(this, intent.getStringExtra("content"), Toast.LENGTH_SHORT).show();
        }
    }
}

activity_aaa.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.three.AAAActivity"
    tools:ignore="MergeRootFrame" >
    <ImageView
        android:id="@+id/image1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/ic_launcher" />
    
 </FrameLayout>

AAAActivity.java

package com.example.three;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;


public class AAAActivity extends ActionBarActivity {

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

    }

}

activity_bbb.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.three.BBBActivity"
    tools:ignore="MergeRootFrame" >

    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/back" />

</FrameLayout>

BBBActivity.java

package com.example.three;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BBBActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bbb);
        
        Button button3 = (Button) findViewById(R.id.button3);
        button3.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent();
                //添加数据
                intent.putExtra("content", "你好！");
                //添加返回码和intent对象
                setResult(2, intent);
                //关闭？？
                finish();
                
            }
        });
    }
}

效果图：
启动按钮：无返回值跳转
启动2按钮：有返回值跳转

intent.gif