Android之垂直顯示TextView

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                                        Android之垂直顯示TextView

            1因為介面需求原因，需要TextView垂直顯示，話不多說，看代碼，我也是搜的例子，在此感謝寫這個例子的大神,在此做個筆記和分享給大家

             2.用到了自訂控制項的知識，下面就來看看如何自訂的

            java代碼如下：

            

package com.android.xxx;

import android.content.Context;

import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.Gravity;
import android.widget.TextView;

public class VerticalTextView extends TextView{
final boolean topDown;

public VerticalTextView(Context context, AttributeSet attrs){
super(context, attrs);
final int gravity = getGravity();
if(Gravity.isVertical(gravity) && (gravity&Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
setGravity((gravity&Gravity.HORIZONTAL_GRAVITY_MASK) | Gravity.TOP);
topDown = false;
}else
topDown = true;
}

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

@Override
protected boolean setFrame(int l, int t, int r, int b){
return super.setFrame(l, t, l+(b-t), t+(r-l));
}

@Override
public void draw(Canvas canvas){
if(topDown){
canvas.translate(getHeight(), 0);
canvas.rotate(90);
}else {
canvas.translate(0, getWidth());
canvas.rotate(-90);
}
canvas.clipRect(0, 0, getWidth(), getHeight(), android.graphics.Region.Op.REPLACE);
super.draw(canvas);
}
}

然後看layout xml布局檔案中

此控制項的寫法：

<com.android.xxx.VerticalTextView
android:id="@+id/xxxName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_marginRight="14dp"
android:textSize="27dp"
android:gravity="bottom|right"
android:maxLength="15"
android:visibility="visible"
android:textColor="#ffffff"
/>

 

Android之垂直顯示TextView