android – TextView在同一个LinearLayout中更改另一个TextView时重新启动Marquee

我有LinearLayout和内部2 TextView都有选框,当我在第一次更新文本然后第二个TextView重新启动选框.

            <LinearLayout
                android:id="@+id/panel"
                android:layout_width="320dp"
                android:layout_height="match_parent"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="2dp"
                android:gravity="center_vertical"
                android:orientation="vertical" >

                <TextView
                    android:id="@+id/first"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:ellipsize="marquee"
                    android:gravity="bottom|center_horizontal"
                    android:marqueeRepeatLimit="marquee_forever"
                    android:singleLine="true" />

                <TextView
                    android:id="@+id/second"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:ellipsize="marquee"
                    android:gravity="top|center_horizontal"
                    android:marqueeRepeatLimit="marquee_forever"
                    android:singleLine="true"
                      />
            </LinearLayout>

我发现如果对于R.id.first和R.id.second我设置layout_width =“320dp”,则不会发生效果.
但我想设置android:layout_width =“match_parent”有一些解决方法吗?

我发现类似的问题但没有解决方案:
Android, RelativeLayout restarts Marquee-TextView when changing ImageView in same RelativeLayout

最佳答案
我有一个类似的问题,解决方案是设置Textview的固定大小.

那么为什么不按程序进行呢?就我而言,它解决了这个问题.以下是我的解决方案:

布局有点复杂,有很多变化的值.这是有趣的部分:

layout.xml:

<!-- The height and visibility values change programatically -->
<RelativeLayout 
    android:layout_width="fill_parent"
    android:layout_height="30dp" 
    android:layout_alignParentBottom="true"
    android:visibility="gone" >

    <FrameLayout>
        ...
        // some code
        ...
    </FrameLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="fill_parent" />

        <!-- My scrolling textview. see below. -->
        <!-- The size will be set when -->
        <!-- the layout will be draw, -->
        <!-- after the Activity.onCreate(). -->
        <!-- I removed ALL THE UNECESSARY (I mean  -->
        <!-- scrollHorizontally, focusable and focusableInTouchMode. -->
        <!-- You don't need it !!!!) -->
        <fr.cmoatoto.android.widget.ScrollingTextView 
            android:id="@+id/text"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:singleLine="true"
            android:ellipsize="marquee"
            android:marqueeRepeatLimit="marquee_forever" />

        <ImageView
            ...
            // some code
            ... />
    </LinearLayout>
</RelativeLayout>

ScrollingTextView已在此answer中定义

这又是:

ScrollingTextView.java:

public class ScrollingTextView extends TextView {

    public ScrollingTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public ScrollingTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ScrollingTextView(Context context) {
        super(context);
    }

    @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;
    }
}

最后是活动.正如我之前所说,你需要设置固定的宽度和高度,以便我们将在onCreate()中使用监听器以编程方式进行:

MyActivity.java:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.layout);


    TextView textView = ((TextView) findViewById(R.id.home_trafic_text));
    textView.setText(getString(R.string.loading));
    textView.setEnabled(true); // Thanks to Romain Guy
    textView.addOnLayoutChangeListener(new OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View v, int left, int top, int right,
                int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
            LayoutParams params = v.getLayoutParams();
            params.width = right - left;
            params.height = bottom - top;
            params.weight = 0;
            v.removeOnLayoutChangeListener(this);
            v.setLayoutParams(params);
        }
    });
}

如果您需要更改方向或类似的东西,请小心,但它对我来说非常好用!

—-编辑PRE-API-11 —

因为OnLayoutChangeListener仅存在于Api v11,所以有一种解决方法(它有效,但我认为它不太好):

从您的活动中删除OnLayoutChangeListener:

MyActivity.java:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.layout);

    TextView textView = ((TextView) findViewById(R.id.home_trafic_text));
    textView.setText(getString(R.string.loading));
    textView.setEnabled(true); // Thanks to Romain Guy
}

并在ScrollingTextView中添加onSizeChanged:

ScrollingTextView.java:

public class ScrollingTextView extends TextView {

    ...
    // Same code as before
    ...

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    LayoutParams params = (LayoutParams) getLayoutParams();
        params.width = w;
        params.height = h;
        params.weight = 0;
        setLayoutParams(params);
    }
}

我希望它有所帮助!

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