實(shí)例詳解用戶輸入 i. 檢測常用手勢
效果:一個(gè)手指實(shí)現(xiàn)(所有手勢事件)和(部分事件的);
A. 所有手勢
activity_main.xml
<TextView android:id="@+id/gesture" android:layout_width="match_parent" android:layout_height="150dp" android:gravity="center" android:text="單擊手勢變化" /><TextView android:id="@+id/doubleTap" android:layout_width="match_parent" android:layout_height="150dp" android:gravity="center" android:text="雙擊手勢變化" />
MainActivity.java
public class MainActivity extends Activity
{
private static final String LOG_TAG = "HelloGesture";
private GestureDetector mGestureDetector = null;
private TextView mGestureTextView = null;
private TextView mDoubleTapTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGestureTextView = (TextView) findViewById(R.id.gesture);
mDoubleTapTextView = (TextView) findViewById(R.id.doubleTap);
// 構(gòu)造GestureDetector對象,傳入監(jiān)聽器對象
mGestureDetector = new GestureDetector(this, mOnGestureListener);
// 傳入雙擊監(jiān)聽器對象
mGestureDetector.setOnDoubleTapListener(mDoubleTapListener);
}
@Override public boolean onTouchEvent(MotionEvent event)
{
// 在onTouchEvent方法中將事件傳遞給手勢檢測對象,否則手勢監(jiān)聽對象中的回調(diào)函數(shù)是不會被調(diào)用的
mGestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
private OnGestureListener mOnGestureListener = new OnGestureListener()
{
@Override
public boolean onSingleTapUp(MotionEvent e)
{
Log.i(LOG_TAG, "onSingleTapUp: " + e.toString());
mGestureTextView.setText("onSingleTapUp: ");
return false;
}
@Override
public void onShowPress(MotionEvent e)
{
Log.i(LOG_TAG, "onShowPress: " + e.toString());
mGestureTextView.setText("onShowPress: ");
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY)
{
Log.i(LOG_TAG, "onScroll: " + e1.toString() + ", " + e2.toString());
mGestureTextView.setText("onScroll ");
return false;
} @Override
public void onLongPress(MotionEvent e)
{
Log.i(LOG_TAG, "onLongPress: " + e.toString());
mGestureTextView.setText("onLongPress: ");
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY)
{
Log.i(LOG_TAG, "onFling: " + e1.toString() + ", " + e2.toString());
mGestureTextView.setText("onFling ");
return false;
}
@Override
public boolean onDown(MotionEvent e)
{
Log.i(LOG_TAG, "onDown: " + e.toString());
mGestureTextView.setText("onDown: ");
return false;
}
}; private OnDoubleTapListener mDoubleTapListener = new OnDoubleTapListener()
{
@Override
public boolean onSingleTapConfirmed(MotionEvent e)
{
Log.i("LOG_TAG", "onSingleTapConfirmed: " + e.toString());
mDoubleTapTextView.setText("onSingleTapConfirmed: ");
return false;
}
@Override
public boolean onDoubleTapEvent(MotionEvent e)
{
Log.i("LOG_TAG", "onDoubleTapEvent: " + e.toString());
mDoubleTapTextView.setText("onDoubleTapEvent: ");
return false;
}
@Override
public boolean onDoubleTap(MotionEvent e)
{
Log.i("LOG_TAG", "onDoubleTap: " + e.toString());
mDoubleTapTextView.setText("onDoubleTap: ");
return false;
}
};}
B. 部分手勢
如果你僅僅只想處理幾種手勢,你可以選擇繼承GestureDetector.SimpleOnGestureListener類,而不是實(shí)現(xiàn)
GestureDetector.OnGestureListener接口
MainActivity.java
public class MainActivity extends Activity
{
private GestureDetector mGestureDetector = null;
private TextView mGestureTextView = null;
private TextView mDoubleTapTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGestureTextView = (TextView) findViewById(R.id.gesture);
mDoubleTapTextView = (TextView) findViewById(R.id.doubleTap);
// 構(gòu)造GestureDetector對象,傳入監(jiān)聽器對象
mGestureDetector = new GestureDetector(this, new MyGestureListener());
// 傳入雙擊監(jiān)聽器對象
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
// 在onTouchEvent方法中將事件傳遞給手勢檢測對象,否則手勢監(jiān)聽對象中的回調(diào)函數(shù)是不會被調(diào)用的
this.mGestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
class MyGestureListener extends GestureDetector.SimpleOnGestureListener
{
private static final String DEBUG_TAG = "Gestures";
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY)
{
Log.d(DEBUG_TAG, "onFling: " + e1.toString() + ", " + e2.toString());
mGestureTextView.setText("onFling ");
return false;
}
@Override
public boolean onDown(MotionEvent e)
{
Log.d(DEBUG_TAG, "onDown: " + e.toString());
mGestureTextView.setText("onDown: ");
return false;
}
}}
相關(guān)文章
Flutter實(shí)現(xiàn)購物車功能(代碼+邏輯)
本文主要介紹了Flutter實(shí)現(xiàn)購物車功能,文中通過示例代碼介紹的非常詳細(xì),對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧2022-03-03
Android自定義view實(shí)現(xiàn)圓的擴(kuò)散效果
這篇文章主要為大家詳細(xì)介紹了Android自定義view實(shí)現(xiàn)圓的擴(kuò)散效果,具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下2019-01-01
Android基于騰訊云實(shí)時(shí)音視頻仿微信視頻通話最小化懸浮
這篇文章主要為大家詳細(xì)介紹了Android基于騰訊云實(shí)時(shí)音視頻實(shí)現(xiàn)類似微信視頻通話最小化懸浮,文中示例代碼介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下2019-11-11
Android獲取驗(yàn)證碼倒計(jì)時(shí)實(shí)現(xiàn)代碼
這篇文章主要為大家詳細(xì)介紹了Android獲取驗(yàn)證碼倒計(jì)時(shí)的實(shí)現(xiàn)代碼,具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下2018-07-07
解析Android點(diǎn)擊事件分發(fā)機(jī)制
本篇文章主要介紹了解析Android點(diǎn)擊事件分發(fā)機(jī)制,小編覺得挺不錯(cuò)的,現(xiàn)在分享給大家,也給大家做個(gè)參考。一起跟隨小編過來看看吧2017-12-12
Android 使用viewpager實(shí)現(xiàn)無限循環(huán)(定時(shí)+手動)
這篇文章主要介紹了Android 使用viewpager實(shí)現(xiàn)無限循環(huán)(定時(shí)+手動)的相關(guān)資料,需要的朋友可以參考下2015-11-11
Android高級xml布局之輸入框EditText設(shè)計(jì)
這篇文章主要為大家詳細(xì)介紹了Android高級xml布局之輸入框EditText設(shè)計(jì),文中示例代碼介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下2017-12-12
Android RecyclerView上拉加載和下拉刷新(基礎(chǔ)版)
這篇文章主要為大家詳細(xì)介紹了Android RecyclerView上拉加載和下拉刷新的相實(shí)現(xiàn)方法,內(nèi)容簡單,具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下2017-02-02

