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技術社區[雲棲]
android仿人人網右邊可推出的效果
添加了拖動功能，按住小圖標，拖動超過一半的時候打開，沒到一半的時候關閉。隻添加了OnGestureListener接口和OnTouchListener。具體代碼看下麵：
package com.dl.test;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewTreeObserver;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout.LayoutParams;
public class App extends Activity implements OnPanelStatusChangedListener,OnTouchListener,GestureDetector.OnGestureListener{
private boolean hasMeasured=false;
private LinearLayout layout_left;
private LinearLayout layout_right;
private ImageView iv;
private int layout_left_width,layout_right_width=0;
/**每次自動展開/收縮的範圍*/
private int MAX_WIDTH=0;
/**每次自動展開/收縮的速度*/
private final static int SPEED=20;
private GestureDetector mGestureDetector;
private boolean isScrolling=false;
private float mScrollX;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
layout_left=(LinearLayout)findViewById(R.id.layout_left);
layout_right=(LinearLayout)findViewById(R.id.layout_right);
iv=(ImageView)findViewById(R.id.iv);
iv.setOnTouchListener(this);
//定義手勢識別
mGestureDetector = new GestureDetector(this,this);
mGestureDetector.setIsLongpressEnabled(false);
calculatorWidth();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
}
@Override
public void onAttachedToWindow() {
// TODO Auto-generated method stub
super.onAttachedToWindow();
}
private void calculatorWidth(){
ViewTreeObserver observer = layout_right.getViewTreeObserver();
//為了取得控件的寬
// observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
// @Override
// public void onGlobalLayout() {
// if (hasMeasured == false){
// layout_right_width = layout_right.getMeasuredWidth();//105
// layout_left_width=layout_left.getMeasuredWidth();//480
// MAX_WIDTH=layout_left_width-layout_right_width;//375
// hasMeasured = true;
// }
// }
// });
//為了取得控件的寬
observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener(){
public boolean onPreDraw(){
if (hasMeasured == false){
layout_right_width = layout_right.getMeasuredWidth();
layout_left_width=layout_left.getMeasuredWidth();
MAX_WIDTH=layout_left_width-layout_right_width;
// Log.i("tag", "MAX_WIDTH=="+MAX_WIDTH);
hasMeasured = true;
//設置可拉動容器的寬為全屏（即不可拉動容器）的寬
View layout_max_width=findViewById(R.id.layout_max_width);
LinearLayout.LayoutParams lp=(LinearLayout.LayoutParams)layout_max_width.getLayoutParams();
lp.width=layout_left_width;
layout_max_width.setLayoutParams(lp);
}
return true;
}
});
}
class AsynMove extends AsyncTask<Integer, Integer, Void> {
@Override
protected Void doInBackground(Integer... params) {
int times;
if (MAX_WIDTH % Math.abs(params[0]) == 0)// 整除
times = MAX_WIDTH / Math.abs(params[0]);
else
times = MAX_WIDTH / Math.abs(params[0]) + 1;// 有餘數
for (int i = 0; i < times; i++) {
publishProgress(params);
try {
Thread.sleep(Math.abs(params[0]));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Integer... params) {
LayoutParams lp = (LayoutParams)layout_right.getLayoutParams();
if (params[0] < 0)
lp.leftMargin = Math.max(lp.leftMargin + params[0], 0);
else
lp.leftMargin = Math.min(lp.leftMargin + params[0], MAX_WIDTH);
if(lp.leftMargin<=0){//展開之後
onPanelOpened();//調用OPEN回調函數
}
else if(lp.leftMargin>=MAX_WIDTH){//收縮之後
onPanelClosed();//調用CLOSE回調函數
}
layout_right.setLayoutParams(lp);
}
}
@Override
public void onPanelOpened() {
// TODO Auto-generated method stub
// Log.i("tag", "=========onPanelOpened========");
}
@Override
public void onPanelClosed() {
// TODO Auto-generated method stub
// Log.i("tag", "=========onPanelClosed========");
}
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
mScrollX=0;
isScrolling=false;
return true;//需要返回ture才能觸發onSingleTapUp
}
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
LayoutParams lp = (android.widget.RelativeLayout.LayoutParams)layout_right.getLayoutParams();
if (lp.leftMargin >=MAX_WIDTH)// CLOSE的狀態
new AsynMove().execute(new Integer[] { -SPEED });// 負數展開
else if (lp.leftMargin >= 0)// OPEN的狀態
new AsynMove().execute(new Integer[] { SPEED });// 正數收縮
return true;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
// TODO Auto-generated method stub
isScrolling=true;
mScrollX+=distanceX;//distanceX:向左為正，右為負
LayoutParams lp = (LayoutParams)layout_right.getLayoutParams();
lp.leftMargin=lp.leftMargin-(int)mScrollX;
if(lp.leftMargin<=0){//展開之後
isScrolling=false;//拖過頭了不需要再執行AsynMove了
lp.leftMargin=0;
onPanelOpened();//調用OPEN回調函數
}
if(lp.leftMargin>=MAX_WIDTH){//收縮之後
isScrolling=false;
lp.leftMargin=MAX_WIDTH;
onPanelClosed();//調用CLOSE回調函數
}
layout_right.setLayoutParams(lp);
return false;
}
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
//拖到一半放開手指時的運動
if(event.getAction()==MotionEvent.ACTION_UP && isScrolling==true){
LayoutParams lp=(LayoutParams) layout_right.getLayoutParams();
if (lp.leftMargin >= (MAX_WIDTH>>1)) {//往左沒超過一半
new AsynMove().execute(new Integer[] { SPEED });
}
else{
new AsynMove().execute(new Integer[] { -SPEED });
}
}
return mGestureDetector.onTouchEvent(event);
}
}
TestMenu.zip (157.1 KB)
最後更新：2017-04-02 16:47:37