仿乐透购彩app(1)

仿乐透购彩app

通过代码设置无标题，全屏

  //设置无标题
  requestWindowFeature(Window.FEATURE_NO_TITLE);
  //设置全屏
  getWindow().setFlags(                   WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ImageView
        android:contentDescription="@null"
        android:id="@+id/welcome_img"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@drawable/loading" >
    </ImageView>

</LinearLayout>

WelcomActivity.java启动界面：是一个图片渐变的过程， 让后跳到主界面：

package com.chb.letou;
import com.chb.letou.util.BitmapUtil;
import com.chb.letou.view.MainView;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.DisplayMetrics;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
/**
 * 启动界面
 */
public class WelcomeActivity extends Activity {
    /*
     * 屏幕高度
     */
    private int screenHeight;
    /**
     * 屏幕宽度
     */
    private int screenWidth;
    private boolean flag = true;
    private int alpanum=0;
    private int count;

    Handler hannext = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what==0) {
                welcome_imageview.setAlpha(alpanum+=1);
            }
            if (msg.what==-1) {
                welcome_imageview.setAlpha(alpanum-=1);
            }
            if (msg.what==1) {
                nextpage();
            }
        }
    };
    private ImageView welcome_imageview;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //无标题
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //设置全屏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.welcome);
        //获取屏幕的尺寸
        DisplayMetrics dm = new DisplayMetrics();  
        getWindowManager().getDefaultDisplay().getMetrics(dm); 
        screenHeight= dm.heightPixels;  
        screenWidth =dm.widthPixels;

        init();
    }

    private void init() {
        // TODO Auto-generated method stub
        welcome_imageview = (ImageView)findViewById(R.id.welcome_img);
        Bitmap srcpic = BitmapFactory.decodeResource(getResources(),R.drawable.loading);
        Bitmap newpic = BitmapUtil.GetNewBitmap(srcpic, screenWidth, screenHeight,screenWidth, screenHeight);
        welcome_imageview.setImageBitmap(newpic);
        new Thread(new Runnable() {

            public void run() {
                while (flag) {
                    try {
                        Thread.sleep(10);
                        count++;
                        hannext.sendEmptyMessage(0);
                        if (count>255) {
                            hannext.sendEmptyMessage(-1);
                        }
                        if (count>500) {
                            hannext.sendEmptyMessage(1);
                        }
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();
    }
    private void nextpage(){
        flag=false;
        finish();
        Intent intent = new Intent(WelcomeActivity.this,MainView.class);
        startActivity(intent);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
    }
}

改进：使用补间动画（Tween Animation）

第一步： 在res/anim文件夹下创建一个动画的设置文件

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator"
    android:shareInterpolator="true" >

    <!-- fromAlpha和toAlpha是起始透明度和结束时透明度 -->
    <alpha
        android:duration="2000"
        android:fromAlpha="0.0"
        android:startOffset="500"
        android:toAlpha="1.0" />

    <!--
       起始x轴坐标
           止x轴坐标
           始y轴坐标
           止y轴坐标
           轴的坐标
           轴的坐标

    -->
    <scale
        android:duration="2000"
        android:fromXScale="0.0"
        android:fromYScale="0.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="1.0"
        android:toYScale="1.0" />

</set>

第二步：
设置动画， 启动动画

//使用AnimationUtils加载动画配置文件
        Animation animation = 
                AnimationUtils.loadAnimation(WelcomeActivity.this, R.anim.loading);
        //启动动画
        welcome_imageview.setAnimation(animation);

package com.chb.letou;


import com.chb.letou.view.MainView;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
/**
 * 启动界面
 */
public class WelcomeActivity extends Activity {


    private ImageView welcome_imageview;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); 

        //无标题
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //设置全屏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.welcome);
        init();
    }

    private void init() {
        welcome_imageview = (ImageView)findViewById(R.id.welcome_img);

        //使用AnimationUtils加载动画配置文件
        Animation animation = 
                AnimationUtils.loadAnimation(WelcomeActivity.this, R.anim.loading);
        //启动动画
        welcome_imageview.setAnimation(animation);

        //跳到主界面
        nextpage();

    }
    private void nextpage(){

        Intent intent = new Intent(WelcomeActivity.this,MainView.class);
        startActivity(intent);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
    }
}

发现问题： 启动界面的动画还没有结束，就跳到了新的界面， 并不是在动画执行完成，而进行finish() ,跳到新的界面。

进一步的改进： 设置动画执行的监听，setAnimationListener()

    welcome_imageview = (ImageView)findViewById(R.id.welcome_img);

        //使用AnimationUtils加载动画配置文件
        Animation animation = 
                AnimationUtils.loadAnimation(WelcomeActivity.this, R.anim.loading);
        //启动动画
        welcome_imageview.startAnimation(animation);
        animation.setAnimationListener(new AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onAnimationRepeat(Animation animation) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                 //动画执行结束

                //跳到主界面
                nextpage();
            }
        });