android138 360 小火箭

package com.itheima52.rocket;import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.graphics.drawable.AnimationDrawable;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.widget.ImageView;/*
* 主界面开启一个服务
startService(new Intent(this, RocketService.class));
finish();
stopService(new Intent(this, RocketService.class));
finish();
*/
public class RocketService extends Service { private WindowManager.LayoutParams params;
private int winWidth;
private int winHeight;
private WindowManager mWM;
private View view; private int startX;
private int startY; @Override
public IBinder onBind(Intent intent) {
return null;
} @Override
public void onCreate() {
super.onCreate(); mWM = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);//WindowManager可以在手机屏幕上显示，而不用依赖于某个activity布局文件。 // 获取屏幕宽高
winWidth = mWM.getDefaultDisplay().getWidth();
winHeight = mWM.getDefaultDisplay().getHeight(); params = new WindowManager.LayoutParams();
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
params.format = PixelFormat.TRANSLUCENT;
params.type = WindowManager.LayoutParams.TYPE_PHONE;// 电话窗口。它用于电话交互（特别是呼入）。它置于所有应用程序之上，状态栏之下。
params.gravity = Gravity.LEFT + Gravity.TOP;// 将重心位置设置为左上方,
// 也就是(0,0)从左上方开始,而不是默认的重心位置
params.setTitle("Toast"); view = View.inflate(this, R.layout.rocket, null);// 初始化火箭布局 // 初始化火箭帧动画
ImageView ivRocket = (ImageView) view.findViewById(R.id.iv_rocket);
/*iv_rocket.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:id="@+id/iv_rocket"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/desktop_rocket_launch_1" /> 火箭图片
</LinearLayout>*/ //火箭冒火帧动画，火苗一直闪烁，
ivRocket.setBackgroundResource(R.drawable.anim_rocket);
/*
anim_rocket.xml
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >
2张图片切换，200毫秒，
<item
android:drawable="@drawable/desktop_rocket_launch_1"
android:duration="200"/>
<item
android:drawable="@drawable/desktop_rocket_launch_2"
android:duration="200"/>
</animation-list>
*/
AnimationDrawable anim = (AnimationDrawable) ivRocket.getBackground();
anim.start(); mWM.addView(view, params); view.setOnTouchListener(new OnTouchListener() { @Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// 初始化起点坐标
startX = (int) event.getRawX();
startY = (int) event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
int endX = (int) event.getRawX();
int endY = (int) event.getRawY(); // 计算移动偏移量
int dx = endX - startX;
int dy = endY - startY; // 更新浮窗位置，WindowManager里面只能用params来移动
params.x += dx;
params.y += dy; // 防止坐标偏离屏幕
if (params.x < 0) {
params.x = 0;
}
if (params.y < 0) {
params.y = 0;
} // 防止坐标偏离屏幕
if (params.x > winWidth - view.getWidth()) {
params.x = winWidth - view.getWidth();
}
if (params.y > winHeight - view.getHeight()) {
params.y = winHeight - view.getHeight();
}
// System.out.println("x:" + params.x + ";y:" + params.y);
mWM.updateViewLayout(view, params); // 重新初始化起点坐标
startX = (int) event.getRawX();
startY = (int) event.getRawY();
break;
case MotionEvent.ACTION_UP:
if (params.x > 100 && params.x < 250 && params.y > winHeight - 120) {
System.out.println("发射火箭!!!");
sendRocket(); // 启动烟雾效果,启动一个Activity,盖住下面的Activity，使得下面的不能点击。
Intent intent = new Intent(RocketService.this,BackgroundActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 通过Service启动Activity,Service不用栈，因此要先启动一个栈来存放activity
startActivity(intent);
}
break; default:
break;
}
return true;
}
});
} private Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
// 更新火箭位置
int y = msg.arg1;
params.y = y;
mWM.updateViewLayout(view, params);
};
}; /**
* 发射火箭
*/
protected void sendRocket() {
// 设置火箭居中发射
params.x = winWidth / 2 - view.getWidth() / 2;
mWM.updateViewLayout(view, params); new Thread() {
@Override
public void run() {
int pos = 380;// 移动总距离
for (int i = 0; i <= 10; i++) {//移动10次，就移动到顶部了。
// 等待一段时间再更新位置,用于控制火箭速度
try {
Thread.sleep(50);//主线程睡眠会让主线程很卡，因此要用子线城。
} catch (InterruptedException e) {
e.printStackTrace();
}
int y = pos - 38 * i;
Message msg = Message.obtain();//不能在子线城更新界面
msg.arg1 = y;
mHandler.sendMessage(msg);
}
}
}.start();
} @Override
public void onDestroy() {
super.onDestroy();
if (mWM != null && view != null) {
mWM.removeView(view);
view = null;
}
}
}

package com.itheima52.rocket;import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.animation.AlphaAnimation;
import android.widget.ImageView;
/**
* 烟雾背景
*/
public class BackgroundActivity extends Activity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); setContentView(R.layout.activity_bg);
/*
activity_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="@+id/iv_bottom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:src="@drawable/desktop_smoke_m" /> 底下的大烟图片
<ImageView
android:id="@+id/iv_top"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/iv_bottom"
android:layout_alignParentLeft="true"
android:src="@drawable/desktop_smoke_t" /> 中间的细长的烟
</RelativeLayout>*/
ImageView ivTop = (ImageView) findViewById(R.id.iv_top);
ImageView ivBottom = (ImageView) findViewById(R.id.iv_bottom); // 渐变动画
AlphaAnimation anim = new AlphaAnimation(0, 1);
anim.setDuration(1000);
anim.setFillAfter(true);// 动画结束后保持状态 // 运行动画
ivTop.startAnimation(anim);
ivBottom.startAnimation(anim); new Handler().postDelayed(new Runnable() {//Handler可以发message也可以发Runnable
@Override
public void run() {
finish();
}
}, 1000);// 延时1秒后结束activity，不能直接调用finish，因为动画要执行1秒钟。
}
}

activity的启动模式：
1.Standard:启动A,然后A启动B，B再启动A。
2.SingleTask:首先启动A,A启动B，B启动C,C启动A的时候把B,C干掉，也就是栈里面只能有一个A.
3.SingleTop:启动A,A启动B,B启动C,C再启动C时不会创建新的C而是用原来的C,因为顶上只能有一个C.
4.SingleInstance:只有一个A,不如许别的进来.