我想做这种水平滚动,看图片
>>>>............................................
XML 文件保存在 res/layout/main.xml:我的 main.xml 文件有错误吗?我想用 .
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="@+id/imageView1"
android:layout_width="wrap_content" android:layout_height="200dp"> </ImageView>
<TextView android:text="Zoo"
android:id="@+id/PicDescription" android:layout_width="wrap_content"
android:textSize="40sp" android:layout_height="wrap_content"
android:layout_gravity="center" android:layout_marginTop="10dp"></TextView>
<TextView android:text="Z" android:id="@+id/captitalText"
android:layout_height="wrap_content" android:layout_gravity="center" android:textSize="100sp"
android:layout_width="wrap_content" android:layout_marginTop="25dp"></TextView>
XML 文件保存在 res/values/letters.xml:
<?xml version="1.0" encoding="utf-8"?>
resources>
<string-array name="desc">
<item>Apple</item>
<item>Ball</item>
...
<item>Zoo</item>
</string-array>
<string-array name="capitalLetter">
<item>A</item>
<item>B</item>
...
<item>Z</item>
</string-array>
android中水平滚动动作的代码是什么?请给我建议,我是安卓新手,我对滚动完全感到困惑。我遵循这个link1 https://stackoverflow.com/questions/5102993/swipe-fling-tab-changing-in-conjunction-with-scrollview link2 https://stackoverflow.com/questions/3171452/scrollview-and-gallery-interfering但无法得到任何想法。
预先感谢您并希望您能解决这个问题。
编辑:9 月 11 日
这是我的代码。当我尝试滚动然后更改 B 时,当完成滚动页面时,A 再次变为。我想,我在滚动完成起始值时调用,对吗?
给我建议我可以做什么来修复此代码。
public class Test 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;
String[] big;
TextView txtbig;
int count=0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
big = getResources().getStringArray(R.array.capitalLetter);
gestureDetector = new GestureDetector(new MyGestureDetector());
View mainview = (View) findViewById(R.id.mainView);
mainview.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
textChange();
return true;
}
return false;
}
});
//textChange();
}
private void textChange() {
txtbig = (TextView) findViewById(R.id.bigText);
String bigTextString=big[count];
txtbig.setText(bigTextString);
count++;
if(count==big.length)
{
count=0;
}
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
Intent intent = new Intent(Test.this.getBaseContext(),Test.class);
//textChange();
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) {
//textChange();
return false;
}
// right to left swipe
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { textChange();
startActivity(intent);
Test.this.overridePendingTransition(
R.anim.slide_in_right, R.anim.slide_out_left);
return true;
// right to left swipe
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
// startActivity(intent);
// textChange();
Test.this.overridePendingTransition(
R.anim.slide_in_left, R.anim.slide_out_right);
}
return false;
}
@Override
public boolean onDown(MotionEvent e) {
return true;
}
}
}