Android 自动调整两个文本视图的大小以显示尽可能多的内容

在水平方向的线性布局中有两个文本视图

LeftText | RightText

目标是充分利用屏幕空间并尽可能多地显示文本值。如果文本超过textview大小，则应使用省略号将其截断。如果其中一个较短，则另一个应扩展到剩余大小

例如，

输入-Short | Short
预期产量Short | Short

输入-短|长
预期产量短|长…

输入-longlong | Short
预期产量LongLong…| Short

输入-longlong | longlong
预期产量LongLong…| LongLong…

我尝试创建一个自定义视图AutoSizingTextLayout（extends LinearLayout），它由两个初始相等布局权重为1的自定义文本视图组成。我为第二个文本视图（右边的一个）添加了一个onDrawListener。第二个文本视图绘制完成后，我会根据截断的文本调整权重

这种逻辑可行，但并不可靠。在一些运行中，它运行得非常完美，但大多数情况下，第一个文本视图占据整个屏幕

我正在将代码的相关部分粘贴到下面。有什么需要处理的吗？有更优雅的解决方案吗？ PS：此自定义视图正在列表回收器视图中使用

public class AutoSizingTextLayout extends LinearLayout implements 
AutoSizingTextView.AutoSizingTextViewDrawListener {

@BindView(R.id.start_text_view)
AutoSizingTextView mStartTextView;

@BindView(R.id.end_text_view)
AutoSizingTextView mEndTextView;

private volatile boolean adjusted = false;

//Constructors

@Override
public void onDraw() {
    if (!adjusted) {
        adjustWeights();
    }
}

public void setStartViewText(String startText) {
    mStartTextView.setText(startText);
}

public void setEndViewText(String endText) {
    adjusted = false;
    mEndTextView.setText(endText);
}

private void initView(AttributeSet attrs) {
    LayoutInflater inflater = LayoutInflater.from(getContext());
    inflater.inflate(R.layout.auto_sizing_text_layout, this);
    ButterKnife.bind(this);
    mEndTextView.setDrawListener(this);
}

private void adjustWeights() {
    boolean startTextHasEllipses = hasEllipses(mStartTextView);
    boolean endTextHasEllipses = hasEllipses(mEndTextView);

    ArrayList<AutoSizingTextView> viewsToUpdate = new ArrayList<>();

    if (startTextHasEllipses && endTextHasEllipses) {
        //Both are truncated. Do nothing.
    } else if (startTextHasEllipses) {
        // Starting text is truncated. End text is not truncated. Give more weight to starting text.
        viewsToUpdate.add(mEndTextView);
    } else if (endTextHasEllipses) {
        // Starting text is not truncated. End text is truncated. Give more weight to ending text.
        viewsToUpdate.add(mStartTextView);
    } else {
        // Both are not truncated. Set it to wrap content.
        viewsToUpdate.add(mStartTextView);
        viewsToUpdate.add(mEndTextView);
    }
    updateView(viewsToUpdate);
}

private void updateView(List<AutoSizingTextView> viewsToUpdate) {
    for (AutoSizingTextView viewToUpdate : viewsToUpdate) {
        LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)
                viewToUpdate.getLayoutParams();
        params.width = LinearLayout.LayoutParams.WRAP_CONTENT;
        params.weight = 0.0F;
        adjusted = true;
        viewToUpdate.setLayoutParams(params);
    }
    this.requestLayout();
}

private static boolean hasEllipses(TextView textView) {
    Layout layout = textView.getLayout();
    if (layout != null) {
        int lines = layout.getLineCount();
        if (lines > 0) {
            if (layout.getEllipsisCount(lines - 1) > 0) {
                return true;
            }
        }
    }
    return false;
}

}

//自动调整大小文本布局.xml

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">

<AutoSizingTextView
    android:id="@+id/start_text_view"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:maxLines="1"
    android:ellipsize="end"/>

<AutoSizingTextView
    android:id="@+id/end_text_view"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:maxLines="1"
    android:ellipsize="end"/>

---

我想以下是预期结果

我为此编写了一个简单的

ViewGroup

。当然，这并不完美。它只是表明它是可以实现的。相应地修改此代码。我已经重写了

视图组

的方法，在该方法中，我正在计算子视图所需的大小并相应地布局它们。此

WeirdView

包含三个

TextView

s，分别用于（左文本、分隔符和右文本）

package com.example.abhinav.textviewexample;

import android.content.Context;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Created by abhinav on 16/04/18.
 */

public class WeirdView extends ViewGroup {

    private TextView mLeftTV;
    private TextView mSeparatorTV;
    private TextView mRightTV;

    public WeirdView(Context context) {
        this(context, null, 0);
    }

    public WeirdView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public WeirdView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    private void init(Context context) {
        mLeftTV = new TextView(context);
        mSeparatorTV = new TextView(context);
        mRightTV = new TextView(context);

        mLeftTV.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        mSeparatorTV.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        mRightTV.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

        addView(mLeftTV);
        addView(mSeparatorTV);
        addView(mRightTV);
    }

    public TextView getLeftTextView() {
        return mLeftTV;
    }

    public TextView getSeparatorTextView() {
        return mSeparatorTV;
    }

    public TextView getRightTextView() {
        return mRightTV;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        // super.onLayout(changed, l, t, r, b);

        final int childLeft = this.getPaddingLeft();
        final int childTop = this.getPaddingTop();
        final int childRight = this.getMeasuredWidth() - this.getPaddingRight();
        final int childBottom = this.getMeasuredHeight() - this.getPaddingBottom();
        final int availableWidth = childRight - childLeft;
        final int availableHeight = childBottom - childTop;

        mLeftTV.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(availableHeight, MeasureSpec.AT_MOST));
        mSeparatorTV.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(availableHeight, MeasureSpec.AT_MOST));
        mRightTV.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(availableHeight, MeasureSpec.AT_MOST));

        // case: |blabla > blablabla         |
        // case: |blablablablablabla > bla   |
        // case: |bla > blablablablablablab..|
        if ((mLeftTV.getMeasuredWidth() + mSeparatorTV.getMeasuredWidth() + mRightTV.getMeasuredWidth() <= availableWidth)
                || (mLeftTV.getMeasuredWidth() <= availableWidth / 2)) {
            int left = childLeft;
            mLeftTV.layout(left, childTop, left + mLeftTV.getMeasuredWidth(), childBottom);
            left += mLeftTV.getMeasuredWidth();
            mSeparatorTV.layout(left, childTop, left + mSeparatorTV.getMeasuredWidth(), childBottom);
            left += mSeparatorTV.getMeasuredWidth();
            mRightTV.layout(left, childTop, childRight, childBottom);
            mRightTV.setWidth(childRight - left);
        }
        // case: |blablablablablabla.. > blab|
        else if (mRightTV.getMeasuredWidth() <= availableWidth / 2) {
            int left = childLeft;
            mLeftTV.layout(left, childTop, childRight - mSeparatorTV.getMeasuredWidth() - mRightTV.getMeasuredWidth(), childBottom);
            mLeftTV.setWidth(childRight - mSeparatorTV.getMeasuredWidth() - mRightTV.getMeasuredWidth() - left);
            left += mLeftTV.getWidth();
            mSeparatorTV.layout(left, childTop, mSeparatorTV.getMeasuredWidth(), childBottom);
            left += mSeparatorTV.getMeasuredWidth();
            mRightTV.layout(left, childTop, mRightTV.getMeasuredWidth(), childBottom);
        }
        // case: |blablabla.. > blablablabl..|
        else {
            int left = childLeft;
            mLeftTV.layout(left, childTop, left + availableWidth / 2 - mSeparatorTV.getMeasuredWidth() / 2, childBottom);
            mLeftTV.setWidth(availableWidth / 2 - mSeparatorTV.getMeasuredWidth() / 2);
            left += (availableWidth / 2 + mSeparatorTV.getMeasuredWidth() / 2);
            mSeparatorTV.layout(left, childTop, left + mSeparatorTV.getMeasuredWidth(), childBottom);
            left += mSeparatorTV.getMeasuredWidth();
            mRightTV.layout(left, childTop, childRight, childBottom);
            mRightTV.setWidth(childRight - left);
        }
    }
}

package com.example.abhinav.textviewexample；
导入android.content.Context；
导入android.support.annotation.Nullable；
导入android.util.AttributeSet；
导入android.view.ViewGroup；
导入android.widget.LinearLayout；
导入android.widget.TextView；
/**
*abhinav于2018年4月16日创建。
*/
公共类WeirdView扩展了ViewGroup{
私人文本视图；
私有文本视图mseparortv；
私人文本视图mRightTV；
公共古怪视图（上下文）{
这个（上下文，null，0）；
}
公共古怪视图（上下文上下文，@Nullable AttributeSet attrs）{
这（上下文，属性，0）；
}
公共古怪视图（上下文上下文，@Nullable AttributeSet attrs，int defStyleAttr）{
super（上下文、attrs、defStyleAttr）；
init（上下文）；
}
私有void init（上下文）{
mLeftTV=新文本视图（上下文）；
mseparortv=新文本视图（上下文）；
mRightTV=新文本视图（上下文）；
mLeftTV.setLayoutParams（新的LinearLayout.LayoutParams（ViewGroup.LayoutParams.WRAP_内容，ViewGroup.LayoutParams.WRAP_内容））；
mseparatorv.setLayoutParams（新的LinearLayout.LayoutParams（ViewGroup.LayoutParams.WRAP_内容，ViewGroup.LayoutParams.WRAP_内容））；
mRightTV.setLayoutParams（新的LinearLayout.LayoutParams（ViewGroup.LayoutParams.WRAP_内容，ViewGroup.LayoutParams.WRAP_内容））；
addView（mLeftTV）；
addView（mseparortv）；
addView（mRightTV）；
}
公共文本视图getLeftTextView（）{
返回FTTV；
}
公共文本视图getSeparatorTextView（）{
返回mseparortv；
}
公共文本视图getRightTextView（）{
返回mRightTV；
}
@凌驾
测量时的保护空隙（内部宽度测量等级、内部高度测量等级）{
超级测量（宽度测量、高度测量）；
}
@凌驾
仅受保护的void布局（布尔值已更改、int l、int t、int r、int b）{
//超级在线布局（更改，l，t，r，b）；
final int childLeft=this.getPaddingLeft（）；
final int childTop=this.getPaddingTop（）；
final int childRight=this.getMeasuredWidth（）-this.getPaddingRight（）；
final int childBottom=this.getMeasuredHeight（）-this.getPaddingBottom（）；
final int availableWidth=childRight-childLeft；
final int availableHeight=childBottom-childTop；
mleftv.measure（MeasureSpec.makeMeasureSpec（可用宽度，最多测量长度），MeasureSpec.makeMeasureSpec（可用高度，最多测量长度））；
mseparortv.measure（MeasureSpec.makeMeasureSpec（可用宽度，最多测量长度），MeasureSpec.makeMeasureSpec（可用高度，最多测量长度））；
mRightTV.measure（MeasureSpec.makeMeasureSpec（可用宽度，最多测量长度），MeasureSpec.makeMeasureSpec（可用高度，最多测量长度））；
//案例：|布拉布拉>布拉布拉|
//案例：| blablabla>bla|
//案例：| bla>blab|
如果（（mLeftTV.getMeasuredWidth（）+mseparortv.getMeasuredWidth（）+mRightTV.getMeasuredWidth（））
package com.example.abhinav.textviewexample;

import android.content.Context;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Created by abhinav on 16/04/18.
 */

public class WeirdView extends ViewGroup {

    private TextView mLeftTV;
    private TextView mSeparatorTV;
    private TextView mRightTV;

    public WeirdView(Context context) {
        this(context, null, 0);
    }

    public WeirdView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public WeirdView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    private void init(Context context) {
        mLeftTV = new TextView(context);
        mSeparatorTV = new TextView(context);
        mRightTV = new TextView(context);

        mLeftTV.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        mSeparatorTV.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        mRightTV.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

        addView(mLeftTV);
        addView(mSeparatorTV);
        addView(mRightTV);
    }

    public TextView getLeftTextView() {
        return mLeftTV;
    }

    public TextView getSeparatorTextView() {
        return mSeparatorTV;
    }

    public TextView getRightTextView() {
        return mRightTV;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        // super.onLayout(changed, l, t, r, b);

        final int childLeft = this.getPaddingLeft();
        final int childTop = this.getPaddingTop();
        final int childRight = this.getMeasuredWidth() - this.getPaddingRight();
        final int childBottom = this.getMeasuredHeight() - this.getPaddingBottom();
        final int availableWidth = childRight - childLeft;
        final int availableHeight = childBottom - childTop;

        mLeftTV.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(availableHeight, MeasureSpec.AT_MOST));
        mSeparatorTV.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(availableHeight, MeasureSpec.AT_MOST));
        mRightTV.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(availableHeight, MeasureSpec.AT_MOST));

        // case: |blabla > blablabla         |
        // case: |blablablablablabla > bla   |
        // case: |bla > blablablablablablab..|
        if ((mLeftTV.getMeasuredWidth() + mSeparatorTV.getMeasuredWidth() + mRightTV.getMeasuredWidth() <= availableWidth)
                || (mLeftTV.getMeasuredWidth() <= availableWidth / 2)) {
            int left = childLeft;
            mLeftTV.layout(left, childTop, left + mLeftTV.getMeasuredWidth(), childBottom);
            left += mLeftTV.getMeasuredWidth();
            mSeparatorTV.layout(left, childTop, left + mSeparatorTV.getMeasuredWidth(), childBottom);
            left += mSeparatorTV.getMeasuredWidth();
            mRightTV.layout(left, childTop, childRight, childBottom);
            mRightTV.setWidth(childRight - left);
        }
        // case: |blablablablablabla.. > blab|
        else if (mRightTV.getMeasuredWidth() <= availableWidth / 2) {
            int left = childLeft;
            mLeftTV.layout(left, childTop, childRight - mSeparatorTV.getMeasuredWidth() - mRightTV.getMeasuredWidth(), childBottom);
            mLeftTV.setWidth(childRight - mSeparatorTV.getMeasuredWidth() - mRightTV.getMeasuredWidth() - left);
            left += mLeftTV.getWidth();
            mSeparatorTV.layout(left, childTop, mSeparatorTV.getMeasuredWidth(), childBottom);
            left += mSeparatorTV.getMeasuredWidth();
            mRightTV.layout(left, childTop, mRightTV.getMeasuredWidth(), childBottom);
        }
        // case: |blablabla.. > blablablabl..|
        else {
            int left = childLeft;
            mLeftTV.layout(left, childTop, left + availableWidth / 2 - mSeparatorTV.getMeasuredWidth() / 2, childBottom);
            mLeftTV.setWidth(availableWidth / 2 - mSeparatorTV.getMeasuredWidth() / 2);
            left += (availableWidth / 2 + mSeparatorTV.getMeasuredWidth() / 2);
            mSeparatorTV.layout(left, childTop, left + mSeparatorTV.getMeasuredWidth(), childBottom);
            left += mSeparatorTV.getMeasuredWidth();
            mRightTV.layout(left, childTop, childRight, childBottom);
            mRightTV.setWidth(childRight - left);
        }
    }
}