我正在尋找一種方法來在用戶滑動包含這些視圖的佈局時更改TextViews
的內容。我的目標是這樣的: Android更改滑動視圖
我試圖做一個SimpleOnGestureListener
(代碼如下)。問題:當我從左向右滑動時,i的值變爲-1,並且沒有反應發生後續滑動。從左到右滑動導致我變成1(地獄是零?),並且視圖停止對滑動再次作出反應。我究竟做錯了什麼?
public class MainActivity extends Activity {
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
private GestureDetector gestureDetector;
public View mainview;
public TextView lol;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gestureDetector = new GestureDetector(new MyGestureDetector());
mainview = (View) findViewById(R.id.mainView);
lol = (TextView) findViewById(R.id.textView2);
mainview.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
});
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
int i = 0;
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) {
return false;
}
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
i++;
lol.setText("Text" + " " + Integer.toString(i));
return true;
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
i--;
lol.setText("Text" + " " + Integer.toString(i));
return true;
}
return false;
}
@Override
public boolean onDown(MotionEvent e) {
return true;
}
}
}
如何使用自定義適配器使用畫廊? – baboo 2013-02-20 13:25:37
可以給你更多的信息嗎? – Droidman 2013-02-20 13:26:40
http://stackoverflow.com/questions/5786769/android-custom-gallery-view-set-own-border,谷歌你會發現很多鏈接和教程,簡單地說就是將一個GalleryView添加到你的活動中,設置一個自定義適配器(擴展baseadapter)到畫廊。在適配器getview中,使用textview和bg以及所有的設置膨脹佈局,並根據索引設置值。祝您好運..無需管理手勢,注意:畫廊已棄用,現在首選Viewpager/HorizontalScrollview ... – baboo 2013-02-20 13:31:49