Android 幾種屏幕間跳轉的跳轉Intent Bundle

2020-04-11 11:58:27

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屏幕使用一個活動來實現，屏幕間是相互獨立的，屏幕之間的跳轉關系通過Intent來實現。

屏幕間跳轉分為以下幾類：

1. 屏幕1直接跳轉到屏幕2

Intent intent = new Intent();

intent.setClass(屏幕1活動名.this,屏幕2活動名.class);

startActivity(intent);

finish(); //結束當前活動

2. 屏幕1帶參數跳轉到屏幕2

使用Bundle來傳參數。

例子：猜拳游戲

界面：

重要代碼：

電腦的選擇是隨機的，本次聯系的基本思路是，三個選項利用三個數字來代替，讓電腦隨機生成一個數字，根據數字的不同來產生不同的結果。

復制代碼代碼如下:

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, "請選擇", Toast.LENGTH_LONG).show();

break;

}

skip();

}

//頁面跳轉

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);

}

跳轉之后，要接受參數：

復制代碼代碼如下:

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

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

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

猜拳游戲完整代碼：

activity_first.xml代碼

復制代碼代碼如下:

</LinearLayout>

activity_second.xml代碼

復制代碼代碼如下:

</LinearLayout>

firstActivity.java代碼

復制代碼代碼如下:

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("猜拳游戲");

        chuquan = (Button)findViewById(R.id.chuquan);
        chuquan.setOnClickListener(mChuQuanListener);
        quans = (RadioGroup)findViewById(R.id.quans);
    }

    private OnClickListener mChuQuanListener = new OnClickListener()
    {

  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
   switch(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, "請選擇", Toast.LENGTH_LONG).show();
                    break;
   }
   //將的到的值傳給secondActivity
   skip();
  }

    };

    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代碼

復制代碼代碼如下:

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("結果");
        tv = (TextView)findViewById(R.id.show);

        Bundle bundle = this.getIntent().getBundleExtra("result");
        int playerInt = bundle.getInt("player");
        int computerInt = bundle.getInt("computer");

        tv.setText("猜拳結果/n");
        tv.append("您的選擇：");
        intChangeString(playerInt);
        tv.append("電腦的選擇：");
        intChangeString(computerInt);
        tv.append("結果：");
        if(playerInt == 0)
        {
        if(computerInt == 0)
        {
          tv.append("平局");
        }
        else if(computerInt == 1)
        {
          tv.append("您是贏家");
        }
        else
        {
          tv.append("電腦是贏家");
        }
        }
        else if(playerInt == 1)
        {
        if(computerInt == 0)
        {
          tv.append("電腦是贏家");
        }
        else if(computerInt == 1)
        {
          tv.append("平局");
        }
        else
        {
          tv.append("您是贏家");
        }
        }
        else
        {
        if(computerInt == 0)
        {
          tv.append("您是贏家");
        }
        else if(computerInt == 1)
        {
          tv.append("電腦是贏家");
        }
        else
        {
          tv.append("平局");
        }
        }
    }

    private void intChangeString(int n)
    {
    switch (n)
    {
         case 0:
         tv.append("石頭/n");
         break;
         case 1:
         tv.append("剪刀/n");
         break;
         case 2:
         tv.append("布/n");
         break;
         default:
         Toast.makeText(secondActivity.this, "錯誤", Toast.LENGTH_LONG).show();
         break;
    }
    }