Android 几种屏幕间跳转的跳转Intent Bundle

来源：互联网发布：手机ip更改软件编辑：程序博客网时间：2024/05/28 15:54

屏幕使用一个活动来实现，屏幕间是相互独立的，屏幕之间的跳转关系通过Intent来实现。

屏幕间跳转分为以下几类：

1. 屏幕1直接跳转到屏幕2

Intent intent = new Intent();

intent.setClass(屏幕1活动名.this,屏幕2活动名.class);

startActivity(intent);

finish(); //结束当前活动

2. 屏幕1带参数跳转到屏幕2

使用Bundle来传参数。

例子：猜拳游戏

界面：

重要代码：

电脑的选择是随机的，本次联系的基本思路是，三个选项利用三个数字来代替，让电脑随机生成一个数字，根据数字的不同来产生不同的结果。

public void onClick(View v) {

switch (radioGroup.getCheckedRadioButtonId()){

case R.id.stone:

player = 0;

break;

case R.id.scissors:

player = 1;

break;

case R.id.textile:

player = 2;

break;

default:

Toast.makeText(MainActivity.this, "请选择", Toast.LENGTH_LONG).show();

break;

}

skip();

}

//页面跳转

private void skip(){

Intent intent = new Intent();

intent.setClass(MainActivity.this, ResultMainActivity.class);

Bundle bundle = new Bundle();

bundle.putInt("player", player);

bundle.putInt("computer", new Random().nextInt(3));

intent.putExtra("result", bundle);

startActivity(intent);

}

跳转之后，要接受参数：

Bundle bundle = this.getIntent().getBundleExtra("result");

int playerInt = bundle.getInt("player");

int computerInt = bundle.getInt("computer");

猜拳游戏完整代码：

activity_first.xml代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="请选择您要出的拳:"        android:textSize="20dip" />        <RadioGroup        android:id="@+id/quans"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal">        <RadioButton            android:id="@+id/shitou"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:checked="true"            android:text="石头"            android:textSize="20dip" />        <RadioButton            android:id="@+id/jiandao"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="20dip"            android:text="剪刀" />        <RadioButton            android:id="@+id/bu"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="20dip"            android:text="布" />    </RadioGroup>    <Button        android:id="@+id/chuquan"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textSize="20dip"        android:text="出拳" /></LinearLayout>activity_second.xml代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:id ="@+id/show"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textSize="20dip"        android:text="@string/hello_world" /></LinearLayout>firstActivity.java代码package com.example.caiquangame;import java.util.Random;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.RadioGroup;import android.widget.Toast;import android.support.v4.app.NavUtils;public class firstActivity extends Activity {private Button chuquan;private RadioGroup quans;private int player;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_first);        setTitle("猜拳游戏");                chuquan = (Button)findViewById(R.id.chuquan);        chuquan.setOnClickListener(mChuQuanListener);        quans = (RadioGroup)findViewById(R.id.quans);    }        private OnClickListener mChuQuanListener = new OnClickListener()    {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubswitch(quans.getCheckedRadioButtonId()){    case R.id.shitou:    player = 0;    break;    case R.id.jiandao:    player = 1;    break;    case R.id.bu:    player = 2;    break;    default:                    Toast.makeText(firstActivity.this, "请选择", Toast.LENGTH_LONG).show();                    break;}//将的到的值传给secondActivityskip();}        };        private void skip()    {    Intent intent = new Intent();    intent.setClass(firstActivity.this, secondActivity.class);    Bundle bundle = new Bundle();    bundle.putInt("player", player);    bundle.putInt("computer", new Random().nextInt(3));    intent.putExtra("result", bundle);    startActivity(intent);    }    }

secondActivity.java代码

package com.example.caiquangame;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.MenuItem;import android.widget.TextView;import android.widget.Toast;import android.support.v4.app.NavUtils;public class secondActivity extends Activity {    private TextView tv;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);        setTitle("结果");        tv = (TextView)findViewById(R.id.show);                Bundle bundle = this.getIntent().getBundleExtra("result");        int playerInt = bundle.getInt("player");        int computerInt = bundle.getInt("computer");                tv.setText("猜拳结果\n");        tv.append("您的选择：");        intChangeString(playerInt);        tv.append("电脑的选择：");        intChangeString(computerInt);        tv.append("结果：");          if(playerInt == 0)        {        if(computerInt == 0)        {        tv.append("平局");        }        else if(computerInt == 1)        {        tv.append("您是赢家");        }        else        {        tv.append("电脑是赢家");        }        }        else if(playerInt == 1)         {        if(computerInt == 0)        {        tv.append("电脑是赢家");        }        else if(computerInt == 1)        {        tv.append("平局");        }        else        {        tv.append("您是赢家");        }        }        else             {        if(computerInt == 0)          {        tv.append("您是赢家");        }        else if(computerInt == 1)        {        tv.append("电脑是赢家");        }        else        {        tv.append("平局");        }        }    }        private void intChangeString(int n)    {    switch (n)    {        case 0:        tv.append("石头\n");        break;        case 1:        tv.append("剪刀\n");        break;        case 2:        tv.append("布\n");        break;        default:        Toast.makeText(secondActivity.this, "错误", Toast.LENGTH_LONG).show();        break;    }    }        }

3. 屏幕1跳转到屏幕2，屏幕2执行结束后有返回值到屏幕1（带返回值跳转）

参考示例程序：ReceiveResult（ApiDemo => App=>Activity=>ReceiveResult）

重要代码：

//屏幕1调转到屏幕2

Intent intent = new Intent(Forward.this,ForwardTargetActivity.class);

startActivityForResult(intent, GET_CODE);

//在屏幕2设置返回值

setResult(RESULT_OK,(new Intent()).setAction("Violet!"));

finish();

//在屏幕1得到从屏幕2返回的内容

@Override

protected void onActivityResult(int RequestCode,int ResultCode,Intent data)

{

if(RequestCode == GET_CODE)

{

if(ResultCode == RESULT_CANCELED)

{

edit.append("canceled!");

}

else

{

edit.append("(okay ");

edit.append(Integer.toString(ResultCode));

edit.append(")");

}

if(data!=null)

{

edit.append(data.getAction());

}

edit.append("\n");

}

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