Android property animation application. I don't know the effect. It's fun !, Android Animation

Android property animation application. I don't know the effect. It's fun !, Android Animation

Two days ago, I downloaded an animation APP to watch cartoons. When I opened it, the tabs below were hidden from the above TITEL and changed to full screen. I felt so awesome, I thought it was a hidden and realistic property. Later I took a closer look. No, it was only an animation. It seems that we have to use property animation to implement it: property animation changes the attributes of an object. I don't know whether the effect is good. It should be suitable for some full-screen reading apps.

Let's take a look at its effect:

Let's take a look at our results:

Well, the code can achieve this very little:

package com.example.hidetitle;import android.annotation.SuppressLint;import android.app.Activity;import android.os.Bundle;import android.view.MotionEvent;import android.view.View;import android.view.ViewPropertyAnimator;import android.view.View.OnTouchListener;import android.widget.ArrayAdapter;import android.widget.LinearLayout;import android.widget.ListView;public class MainActivity extends Activity {private boolean ismove  = true;private ViewPropertyAnimator animatebottom,animatetop;@SuppressLint("NewApi")@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ListView mListView = (ListView) findViewById(R.id.my_listview);LinearLayout  tabbottom  = (LinearLayout) findViewById(R.id.tabbottom);LinearLayout  tabtop  = (LinearLayout) findViewById(R.id.tabtop);animatebottom = tabbottom.animate();animatetop = tabtop.animate();ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1);for (int i = 0; i < 100; i++) {adapter.add(i + "");}mListView.setAdapter(adapter);mListView.setOnTouchListener(new OnTouchListener() {private float y;private boolean down = true;private float lasty;@Overridepublic boolean onTouch(View v, MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:y = event.getY();if (down) {lasty = y;}down = false;break;case MotionEvent.ACTION_MOVE:break;case MotionEvent.ACTION_UP:down = true;if (lasty - event.getY() < -5) {onScrollReset();} else if (lasty - event.getY() > 5) {onScroll();}break;}return false;}});}@SuppressLint("NewApi")public void onScroll() {if (ismove) {animatebottom.setDuration(500).translationY(200);animatetop.setDuration(500).translationY(-200);ismove = false;}}@SuppressLint("NewApi")public void onScrollReset() {if (!ismove) {animatebottom.setDuration(500).translationY(0);animatetop.setDuration(500).translationY(0);ismove = true;}}}

Xml:

<FrameLayout xmlns: android = "http://schemas.android.com/apk/res/android" android: layout_width = "fill_parent" android: layout_height = "fill_parent"> <ListView android: id = "@ + id/my_listview" android: layout_width = "match_parent" android: layout_height = "match_parent"> </ListView> <RelativeLayout android: layout_width = "inline" android: layout_height = "match_parent"> <LinearLayout android: id = "@ + id/tabbottom" android: layout_width = "match_parent" android: layout_height = "50dip" android: layout_alignParentBottom = "true" android: background = "#880090D9" android: gravity = "center" android: orientation = "vertical"> <TextView android: id = "@ + id/textView1" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "title" android: textColor = "# ffffff" android: textSize = "18sp"/> </LinearLayout> <LinearLayout android: id = "@ + id/tabtop" android: layout_width = "match_parent" android: layout_height = "50dip" android: layout_alignParentTop = "true" android: background = "#880090D9" android: gravity = "center" android: orientation = "vertical"> <TextView android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "title" android: textColor = "# ffffff" android: textSize = "18sp"/> </LinearLayout> </RelativeLayout> </FrameLayout>

Fun!