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请看看下面的代码OnTouchListener不解雇
XML代码
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".ParagraphReader" >
<ScrollView
android:id="@+id/paragraph_reader_scroll_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/paragraph_reader_txt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="30"
android:singleLine="false"
android:enabled="true"
>
</TextView>
</ScrollView>
</RelativeLayout>
的Java代码
package k.k;
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View.OnTouchListener;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class ParagraphReader extends Activity {
private TextView paraText;
private DatabaseConnector database;
private List<String>paraList;
private int currentQuestion;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_paragraph_reader);
paraText = (TextView)findViewById(R.id.paragraph_reader_txt);
paraText.setOnTouchListener(paraSwiped);
paraList = new ArrayList<String>();
database = DatabaseHandler.getInstance(this);
//Get the Paragraph list
int listNumber = getIntent().getIntExtra("PARAGRAPH_LIST", 0);
Toast.makeText(this, "Selected Paragraph: "+listNumber, Toast.LENGTH_LONG).show();
paraList = database.getParagraphList(listNumber);
Toast.makeText(this, "ParaList size "+paraList.size(), Toast.LENGTH_LONG).show();
//Toast.makeText(this, "Size: "+paraList.size(), Toast.LENGTH_LONG).show();
paraText.setText(paraList.get(0));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.paragraph_reader, menu);
return true;
}
//The Event Handler for the Paragraph Text holder
OnTouchListener paraSwiped = new OnSwipeTouchListener()
{
public boolean onSwipeRight()
{
Toast.makeText(ParagraphReader.this, "Right: "+paraList.size(), Toast.LENGTH_SHORT).show();
return true;
}
public boolean onSwipeLeft()
{
Toast.makeText(ParagraphReader.this, "Left: "+paraList.size(), Toast.LENGTH_SHORT).show();
return true;
}
};
}
在这里,你可以看到我已经实现一个OnTouchListener
到TextView
。以下是OnTouchListener
类的代码。此代码由SO成员之一构建。
package k.k;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());
public boolean onTouch(final View v, final MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return super.onDown(e);
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
result = onSwipeRight();
} else {
result = onSwipeLeft();
}
}
} else {
if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
result = onSwipeBottom();
} else {
result = onSwipeTop();
}
}
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public boolean onSwipeRight() {
return false;
}
public boolean onSwipeLeft() {
return false;
}
public boolean onSwipeTop() {
return false;
}
public boolean onSwipeBottom() {
return false;
}
}
我只需要左右滑动,但由于某种原因,Swipong不起作用。是的,它不工作,这意味着什么都没有发生。我真的不明白如何解决这个问题。我知道由SO成员开发的代码正在工作,因为我正在另一项活动中使用它。
求助。
您可能会尝试使用android:clickable =“true”使文本视图可点击。不确定这会解决问题,但它是值得一试的。我不确定android:enabled是什么,所以它可能会做同样的事情。 – user2483079
@ user2483079:是的,你是对的。请提供评论作为答案 –