自定义布局好文章

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http://blog.csdn.net/mchenys/article/details/50408819

http://www.cnblogs.com/angeldevil/p/3836256.html

我一个需求，一个textview后边紧跟一个imageview, 但是如果空间不够的情况，textview变为....

package com.example.myapplication;import android.content.Context;import android.graphics.Bitmap;import android.graphics.drawable.BitmapDrawable;import android.util.AttributeSet;import android.util.Log;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.TextView;/** * Created by  on 2016/8/5. */public class mylayout extends RelativeLayout{    private static final String TAG = "mylayout";    TextView mTextView;    ImageView mImageview;    int mImageview_width;    public mylayout(Context context) {        super(context);    }    public mylayout(Context context, AttributeSet attrs) {        super(context, attrs);    }    public mylayout(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);    }    @Override    protected void onFinishInflate() {        super.onFinishInflate();      /*  mTextView = (TextView) findViewById(R.id.text);        mImageview = (ImageView) findViewById(R.id.image);*/        mTextView = (TextView)getChildAt(0);        mTextView.setId(11);        mImageview = (ImageView)getChildAt(1);        Bitmap image = ((BitmapDrawable) mImageview.getDrawable()).getBitmap();        int h = image.getHeight();        mImageview_width = image.getWidth();    }    @Override    protected void onLayout(boolean changed, int l, int t, int r, int b) {        super.onLayout(changed, l, t, r, b);        Log.d(TAG, "onLayout: :"+this.getWidth());        Log.d(TAG,"mTextView.getWidth():"+mTextView.getWidth());        Log.d(TAG, "onLayout: mImageview_width:"+mImageview_width);        if (mTextView.getWidth() + mImageview_width <= this.getWidth()) {            RelativeLayout.LayoutParams labelParams = (LayoutParams) mImageview.getLayoutParams();            labelParams.removeRule(ALIGN_PARENT_RIGHT);            labelParams.addRule(RelativeLayout.RIGHT_OF,11);            mImageview.setLayoutParams(labelParams);        } else {            Log.d(TAG, "onFinishInflate:setWidth " + (this.getWidth() - mImageview_width));            mTextView.setWidth(this.getWidth() - mImageview_width);        }    }}

布局文件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="wrap_content"    android:layout_height="match_parent"    android:orientation="vertical"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.myapplication.MainActivity">    <com.example.myapplication.mylayout        android:layout_width="200dp"        android:layout_height="wrap_content"        android:background="#ffcc00">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:layout_gravity="center_vertical"            android:singleLine="true"            android:text="12345678"            />        <ImageView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:scaleType="center"            android:src="@mipmap/ic_launcher" />    </com.example.myapplication.mylayout>    <com.example.myapplication.mylayout        android:layout_width="80dp"        android:layout_height="wrap_content"        android:layout_marginTop="10dp"        android:background="#ffcc00">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:layout_gravity="center_vertical"            android:singleLine="true"            android:text="12345678"            />        <ImageView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:scaleType="center"            android:src="@mipmap/ic_launcher" />    </com.example.myapplication.mylayout></LinearLayout>

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