android设置按钮图片_Android Button设置9格式图片当背景发现Button的text不显示了

‘壹’ android设置控件样式（边框颜色，圆角）和图片样式（圆角）

本文链接：https://blog.csdn.net/weixin_37577039/article/details/79090433

```

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">

<solid android:color="@color/colorAccent" />



<corners android:topLeftRadius="5dp"

android:topRightRadius="5dp"

android:bottomRightRadius="5dp"

android:bottomLeftRadius="5dp"/>

<stroke android:width="1dp" android:color="#000000" />

</shape

```

```
<?xml version="1.0" encoding="UTF-8"?>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">



<item>

<shape>

<solid android:color="#3bbaff" />

</shape>

</item>



<item

android:right="1dp"

android:left="1dp"

android:top="1dp"

android:bottom="1dp">

<shape>



<solid android:color="#ffffff" />



<padding android:bottom="10dp"

android:left="10dp"

android:right="10dp"

android:top="10dp" />

</shape>

</item>

</layer-list>

```

使用：

```android:background="@drawable/button_edge"```

```
<?xml version="1.0" encoding="UTF-8"?>

<shape

xmlns:android="http://schemas.android.com/apk/res/android"

android:shape="rectangle">



<solid android:color="#FFFFFF" />





<corners

android:radius="5dip" />















**设置文字padding**



<padding

android:left="10dp"

android:top="10dp"

android:right="10dp"

android:bottom="10dp"

/>

</shape>

```

```
<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">

<solid android:color="#FFFFFF" />

<corners android:topLeftRadius="10dp"

android:topRightRadius="10dp"

android:bottomRightRadius="10dp"

android:bottomLeftRadius="10dp"/>

</shape>

```

使用：

```

android:background="@drawable/image_circle"

```

```
Glide.with(MainActivity.this).load(croppedUri)

.transform(new GlideRectRound(MainActivity.this,6)).into(headIcon);

```

```

import android.content.Context;

import android.content.res.Resources;

import android.graphics.Bitmap;

import android.graphics.BitmapShader;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.RectF;

import android.util.Log;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;

import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;

/**

* Created by SiHao on 2018/3/3.

* Glide 的圆角图片工具类

*/

public class GlideRectRound extends BitmapTransformation {

private static float radius = 0f;

// 构造方法1 无传入圆角度数设置默认值为5

public GlideRectRound(Context context) {

this(context, 5);

}

// 构造方法2 传入圆角度数

public GlideRectRound(Context context, int dp) {

super(context);

// 设置圆角度数

radius = Resources.getSystem().getDisplayMetrics().density * dp;

}

// 重写该方法返回修改后的Bitmap

@Override

protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {

return rectRoundCrop(pool,toTransform);

}

@Override

public String getId() {

Log.e("getID",getClass().getName() + Math.round(radius));

return getClass().getName() + Math.round(radius); // 四舍五入

}

private Bitmap rectRoundCrop(BitmapPool pool, Bitmap source){

if (source == null) return null;

Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888); // ARGB_4444——代表4x4位ARGB位图,ARGB_8888——代表4x8位ARGB位图

if (result == null) {

result = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);

}

Canvas canvas = new Canvas(result);

Paint paint = new Paint();

// setShader 对图像进行渲染

// 子类之一 BitmapShader设置Bitmap的变换 TileMode 有CLAMP （取bitmap边缘的最后一个像素进行扩展），REPEAT（水平地重复整张bitmap）

//MIRROR(和REPEAT类似，但是每次重复的时候，将bitmap进行翻转)

paint.setShader(new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));

paint.setAntiAlias(true); // 抗锯齿

RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());

canvas.drawRoundRect(rectF, radius, radius, paint);

return result;

}

}

```

圆角：

```

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapShader;

import android.graphics.Canvas;

import android.graphics.Paint;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;

import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;

/**

* Created by SiHao on 2018/3/3.

* Glide圆形图片工具类

*/

public class GlideCircleBitmap extends BitmapTransformation{

public GlideCircleBitmap(Context context) {

super(context);

}

// 重写该方法返回修改后的Bitmap

@Override

protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {

return circleCrop(pool, toTransform);

}

@Override

public String getId() {

return getClass().getName();

}

private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {

if (source == null) return null;

// 边长取长宽最小值

int size = Math.min(source.getWidth(), source.getHeight());

int x = (source.getWidth() - size) / 2;

int y = (source.getHeight() - size) / 2;

// TODO this could be acquired from the pool too

Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);

Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);// ARGB_4444——代表4x4位ARGB位图,ARGB_8888——代表4x8位ARGB位图

if (result == null) {

result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);

}

Canvas canvas = new Canvas(result);

Paint paint = new Paint();

// setShader 对图像进行渲染

// 子类之一 BitmapShader设置Bitmap的变换 TileMode 有CLAMP （取bitmap边缘的最后一个像素进行扩展），REPEAT（水平地重复整张bitmap）

//MIRROR(和REPEAT类似，但是每次重复的时候，将bitmap进行翻转)

paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));

paint.setAntiAlias(true);// 抗锯齿

// 半径取 size的一半

float r = size / 2f;

canvas.drawCircle(r, r, r, paint);

return result;

}

}

```

```

URL url = new URL(String类型的字符串); //将String类型的字符串转换为URL格式

holder.UserImage.setImageBitmap(BitmapFactory.decodeStream(url.openStream()));

```

```

//得到资源文件的BitMap

Bitmap image= BitmapFactory.decodeResource(getResources(),R.drawable.dog);

//创建RoundedBitmapDrawable对象

RoundedBitmapDrawable roundImg =RoundedBitmapDrawableFactory.create(getResources(),image);

//抗锯齿

roundImg.setAntiAlias(true);

//设置圆角半径

roundImg.setCornerRadius(30);

//设置显示图片

imageView.setImageDrawable(roundImg);

```

```
//如果是圆的时候，我们应该把bitmap图片进行剪切成正方形，然后再设置圆角半径为正方形边长的一半即可

Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.dog);

Bitmap bitmap = null;

//将长方形图片裁剪成正方形图片

if (image.getWidth() == image.getHeight()) {

bitmap = Bitmap.createBitmap(image, image.getWidth() / 2 - image.getHeight() / 2, 0, image.getHeight(), image.getHeight());

} else {

bitmap = Bitmap.createBitmap(image, 0, image.getHeight() / 2 - image.getWidth() / 2, image.getWidth(), image.getWidth());

}

RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), bitmap);

//圆角半径为正方形边长的一半

roundedBitmapDrawable.setCornerRadius(bitmap.getWidth() / 2);

//抗锯齿

roundedBitmapDrawable.setAntiAlias(true);

imageView.setImageDrawable(roundedBitmapDrawable);

```

‘贰’ Android Button设置.9格式图片当背景，发现Button的text不显示了

要这么纠结不你可以用textview做
Button
然后用上背景和字就不会挡住了

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