我正在尝试制作一个放置在ScrollView中的不可编辑的EditText，并以编程方式控制滚动（当检测到左/右投掷时）。
好的，这是我简单的布局：
<?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"
>
<ScrollView
android:id="@+id/sv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<EditText android:id="@+id/maintext"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:longClickable="false"
android:selectAllOnFocus="false"
android:focusable="false"
android:editable="false"/>
</ScrollView>
</LinearLayout>
这是我的简单程序：
package com.test.testscroll;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.widget.EditText;
import android.widget.ScrollView;
import android.widget.Toast;
public class TestScroll extends Activity {
private EditText mMainText;
private ScrollView mScrollView;
private GestureDetector gestureDetector;
View.OnTouchListener gestureListener;
private GestureDetector scrollGestureDetector;
View.OnTouchListener scrollGestureListener;
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 final String testString = "This is a very long line for testing purpose. Line number 1" +
"This is a very long line for testing purpose. Line number 2" +
"This is a very long line for testing purpose. Line number 3" +
"This is a very long line for testing purpose. Line number 4" +
"This is a very long line for testing purpose. Line number 5" +
"This is a very long line for testing purpose. Line number 6" +
"This is a very long line for testing purpose. Line number 7" +
"This is a very long line for testing purpose. Line number 8" +
"This is a very long line for testing purpose. Line number 9" +
"This is a very long line for testing purpose. Line number 10" +
"This is a very long line for testing purpose. Line number 11" +
"This is a very long line for testing purpose. Line number 12" +
"This is a very long line for testing purpose. Line number 13" +
"This is a very long line for testing purpose. Line number 14" +
"This is a very long line for testing purpose. Line number 15" +
"This is a very long line for testing purpose. Line number 16" +
"This is a very long line for testing purpose. Line number 17" +
"This is a very long line for testing purpose. Line number 18" +
"This is a very long line for testing purpose. Line number 19" +
"This is a very long line for testing purpose. Line number 20" +
"This is a very long line for testing purpose. Line number 21" +
"This is a very long line for testing purpose. Line number 22" +
"This is a very long line for testing purpose. Line number 23" +
"This is a very long line for testing purpose. Line number 24" +
"This is a very long line for testing purpose. Line number 25" +
"This is a very long line for testing purpose. Line number 26" +
"This is a very long line for testing purpose. Line number 27" +
"This is a very long line for testing purpose. Line number 28" +
"This is a very long line for testing purpose. Line number 29" +
"This is a very long line for testing purpose. Line number 30" +
"This is a very long line for testing purpose. Line number 31" +
"This is a very long line for testing purpose. Line number 32" +
"This is a very long line for testing purpose. Line number 33" +
"This is a very long line for testing purpose. Line number 34" +
"This is a very long line for testing purpose. Line number 35" +
"This is a very long line for testing purpose. Line number 36" +
"This is a very long line for testing purpose. Line number 37" +
"This is a very long line for testing purpose. Line number 38" +
"This is a very long line for testing purpose. Line number 39" +
"This is a very long line for testing purpose. Line number 40" +
"This is a very long line for testing purpose. Line number 41" +
"This is a very long line for testing purpose. Line number 42" +
"This is a very long line for testing purpose. Line number 43" +
"This is a very long line for testing purpose. Line number 44" +
"This is a very long line for testing purpose. Line number 45" +
"This is a very long line for testing purpose. Line number 46" +
"This is a very long line for testing purpose. Line number 47" +
"This is a very long line for testing purpose. Line number 48" +
"This is a very long line for testing purpose. Line number 49" +
"This is a very long line for testing purpose. Line number 50";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mMainText = (EditText) findViewById(R.id.maintext);
mScrollView = (ScrollView) findViewById(R.id.sv);
mMainText.setText(testString);
// Gesture detection
gestureDetector = new GestureDetector(new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
};
mMainText.setOnTouchListener(gestureListener);
scrollGestureDetector = new GestureDetector(new ScrollGestureDetector());
scrollGestureListener = new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (scrollGestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
};
mScrollView.setOnTouchListener(scrollGestureListener);
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// right to left swipe
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(TestScroll.this, "Left Swipe", Toast.LENGTH_SHORT).show();
mScrollView.pageScroll(ScrollView.FOCUS_UP);
return true;
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(TestScroll.this, "Right Swipe", Toast.LENGTH_SHORT).show();
mScrollView.pageScroll(ScrollView.FOCUS_DOWN);
return true;
}
} catch (Exception e) {
// nothing
}
return false;
}
}
class ScrollGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
return true;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)
{
return true;
}
@Override
public void onLongPress(MotionEvent e)
{
// Do nothing
}
}
}
因此，为了简单解释一下，我有两个自定义的simplegesture类，我附加到EditText和ScrollView。对于EditText，我正在尝试检测左/右投掷，当检测到时，我将其向上/向下滚动1页。附加到ScrollView的自定义simplegesture用于禁用手指滚动。
这是完成正确投掷后的屏幕截图： http://img830.imageshack.us/i/textcut.png/
我现在有点工作，但我有两个问题：
谢谢！
答案 0 :(得分：1)
“3.以编程方式滚动EditText，它不起作用”
将带有滚动代码的Runnable发布到ScrollView，而不是直接调用滚动方法。
发布（Runnable动作）
使Runnable添加到消息队列中。 runnable将在。上运行 用户界面线程。
来自：ScrollView and programmatically scrolling
Lance Nanek
你可以使用过去的线程 挖出。基本上你必须给予 ScrollView有机会实现它 添加了一些东西。例如：
scroll.post（new Runnable（）{
public void run（）{
scroll.fullScroll（ScrollView.FOCUS_DOWN）; }}）;
答案 1 :(得分：0)
将以下行添加到xml edittext控件，
android:scrollbars="vertical" android:fadeScrollbars="false"
然后将此留言添加到编码
"EditText Control Object".setMovementMethod(new ScrollingMovementMethod());
答案 2 :(得分：0)
它迟到但可能会帮助一个人解决这个问题.. 添加最后一个元素并为scrollView更新它需要大约200分钟，所以这肯定会有效。
void scrollDown()
{
Thread scrollThread = new Thread(){
public void run(){
try {
sleep(200);
ChatActivity.this.runOnUiThread(new Runnable() {
public void run() {
myScrollView.fullScroll(View.FOCUS_DOWN);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
};
scrollThread.start();
}
在向scrollView添加元素后调用scrollDown();。