雷达扫描

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转载请注明出入:http://blog.csdn.net/forwardyzk/article/details/42640031

模拟扫描文件的效果,模拟雷达扫描。

思路:

1.使用旋转动画和渐变动画的结合。

2.使用线程和Handler进行消息的传递,刷新界面

不要在主线程上做耗时操作,不要在主线程上刷新界面。

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <LinearLayout        android:layout_width="match_parent"        android:layout_height="120dip"        android:orientation="horizontal" >        <FrameLayout            android:layout_width="120dip"            android:layout_height="120dip" >            <ImageView                android:layout_width="80dip"                android:layout_height="80dip"                android:layout_gravity="center"                android:src="@drawable/act_radar_bg" />            <ImageView                android:id="@+id/im_scan"                android:layout_width="65dip"                android:layout_height="65dip"                android:layout_gravity="center"                android:src="@drawable/act_radar_scanning_03" />            <ImageView                android:id="@+id/im_dian"                android:layout_width="65dip"                android:layout_height="65dip"                android:layout_gravity="center"                android:src="@drawable/act_radar_dian_03" />        </FrameLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:gravity="center"            android:orientation="vertical" >            <TextView                android:id="@+id/tv_lodingApk"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:singleLine="true"                android:text="正在扫描:XXX.Apk"                android:textSize="12sp" />            <ProgressBar                android:id="@+id/pb_loding"                style="?android:attr/progressBarStyleHorizontal"                android:layout_width="fill_parent"                android:layout_height="wrap_content"                android:layout_marginLeft="15dip"                android:layout_marginRight="15dip"                android:progressDrawable="@drawable/progress_horizontal" />        </LinearLayout>    </LinearLayout>    <TextView        android:id="@+id/tv_count"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="已经扫描了XX文件" />    <ScrollView        android:layout_width="match_parent"        android:layout_height="match_parent" >        <LinearLayout            android:id="@+id/ll_scanText"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="vertical" >            <TextView                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:text="文件" />        </LinearLayout>    </ScrollView></LinearLayout>
MainActivity.java

初始化动画

animation = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF, 0.5f);animation.setDuration(2000);animation.setRepeatCount(Animation.INFINITE);animation2 = new AlphaAnimation(0.0f, 1.0f);animation2.setDuration(3000);animation2.setRepeatCount(Animation.INFINITE);im_scan.startAnimation(animation);im_dian.startAnimation(animation2);

开启线程

thread = new Thread() {public void run() {pb_loding.setMax(200);for (count = 1; count <= pb_loding.getMax(); count++) {Message msg = Message.obtain();msg.what = SCAN_LODING;handler.sendMessage(msg);pb_loding.setProgress(count);SystemClock.sleep(200);}Message msg = Message.obtain();msg.what = FINSH_SCAN;handler.sendMessage(msg);};};thread.start();

刷新界面

private Handler handler = new Handler() {public void handleMessage(Message msg) {switch (msg.what) {case SCAN_LODING:TextView tv = new TextView(MainActivity.this);tv.setTextSize(14);tv_count.setText("已扫描:" + count + "个文件");tv_lodingApk.setText("正在扫描:第" + count + "个文件");if (count - 1 != 0)tv.setText("第" + (count - 1) + "个文件已经扫描");ll_scanText.addView(tv, 0);break;case FINSH_SCAN:tv_lodingApk.setText("扫描完毕");TextView tv1 = new TextView(MainActivity.this);tv1.setTextSize(14);tv1.setText("第" + count + "个文件已经扫描");ll_scanText.addView(tv1, 0);im_scan.clearAnimation();// 清除此ImageView身上的动画im_dian.clearAnimation();// 清除此ImageView身上的动画break;}};};

源码下载: http://download.csdn.net/detail/forwardyzk/8352683 

效果图:



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