我正在显示文本的TextView，似乎太长，以适合
在一个屏幕上。我需要使我的TextView可滚动。我该怎么办
了吗?
代码如下:
final TextView tv = new TextView(this);
tv.setBackgroundResource(R.drawable.splash);
tv.setTypeface(face);
tv.setTextSize(18);
tv.setTextColor(R.color.BROWN);
tv.setGravity(Gravity.CENTER_VERTICAL| Gravity.CENTER_HORIZONTAL);
tv.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent e) {
Random r = new Random();
int i = r.nextInt(101);
if (e.getAction() == e.ACTION_DOWN) {
tv.setText(tips[i]);
tv.setBackgroundResource(R.drawable.inner);
}
return true;
}
});
setContentView(tv);
我知道这是一篇较老的文章，但这就是我在Java方面处理这个问题的方式。
// Allow textView to scroll
tv.setSingleLine(true);
tv.setHorizontallyScrolling(true);
tv.setEllipsize(TextUtils.TruncateAt.MARQUEE);
tv.setMarqueeRepeatLimit(-1); // Infinite
// TextView must be 'selected'
tv.setSelected(true);
// Padding not necessary, but this helps so the text isn't right
// up against the side of a screen/layout
tv.setPadding(10, 0, 10, 0);
所有真正需要的是setMovementMethod()。下面是一个使用LinearLayout的例子。
文件main。xml
<?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"
>
<TextView
android:id="@+id/tv1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@string/hello"
/>
</LinearLayout>
文件WordExtractTest.java
public class WordExtractTest extends Activity {
TextView tv1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv1 = (TextView)findViewById(R.id.tv1);
loadDoc();
}
private void loadDoc() {
String s = "";
for(int x=0; x<=100; x++) {
s += "Line: " + String.valueOf(x) + "\n";
}
tv1.setMovementMethod(new ScrollingMovementMethod());
tv1.setText(s);
}
}
我为此挣扎了一个多星期，终于想出了如何做到这一点!
我的问题是，所有内容都会以“块”的形式滚动。文本本身是滚动的，但不是一行一行地滚动。这显然对我不起作用，因为它会切断底部的线条。以前所有的解决方案都不适合我，所以我自己设计了一个。
这是目前为止最简单的解决方案:
在包中创建一个名为:'PerfectScrollableTextView'的类文件，然后复制并粘贴以下代码:
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.TextView;
public class PerfectScrollableTextView extends TextView {
public PerfectScrollableTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setVerticalScrollBarEnabled(true);
setHorizontallyScrolling(false);
}
public PerfectScrollableTextView(Context context, AttributeSet attrs) {
super(context, attrs);
setVerticalScrollBarEnabled(true);
setHorizontallyScrolling(false);
}
public PerfectScrollableTextView(Context context) {
super(context);
setVerticalScrollBarEnabled(true);
setHorizontallyScrolling(false);
}
@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
if(focused)
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
@Override
public void onWindowFocusChanged(boolean focused) {
if(focused)
super.onWindowFocusChanged(focused);
}
@Override
public boolean isFocused() {
return true;
}
}
最后改变你的“TextView”在XML:
来自:< TextView
: < com.your_app_goes_here.PerfectScrollableTextView
