Adnroid activity截屏 保存显示到相册 View显示图片 动画消失

今天项目有个需求，截屏Activity界面，保存到本地，然后即时发送图片的时候能找到这张图片发送

流程：截屏->保存到本地->发送广播通知更新图库

先贴效果图

截屏过程



截屏后保存的文件



截屏的图片

1、写个ScreenCaptureUtil工具，实现截屏和保存，代码如下

/**
* Created by nxm on 2018/1/20.
*/

public class ScreenCaptureUtil {

private static ScreenCaptureUtil instance = null;

private ScreenCaptureUtil() {
}

public static ScreenCaptureUtil getInstance() {
if (null == instance) {
instance = new ScreenCaptureUtil();
}
return instance;
}

public Bitmap getScreen(Activity activity) {
View dView = activity.getWindow().getDecorView();
dView.setDrawingCacheEnabled(false);
dView.buildDrawingCache();
Bitmap bitmap = Bitmap.createBitmap(dView.getDrawingCache());
if (bitmap != null) {
try {
// 首先保存图片
String storePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "HIS";
File appDir = new File(storePath);
if (!appDir.exists()) {
appDir.mkdir();
}
String fileName = System.currentTimeMillis() + ".jpg";
File file = new File(appDir, fileName);

BufferedOutputStream bos = new BufferedOutputS
4000
tream(new FileOutputStream(file));
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, bos);
bos.flush();
bos.close();

Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri uri = Uri.fromFile(file);
intent.setData(uri);
activity.sendBroadcast(intent);
dView.destroyDrawingCache();
return bitmap;
} catch (Exception e) {
return null;
}
} else {
return null;
}
}
}

重点：

1）获取activity截屏生成Bitmap

View dView = activity.getWindow().getDecorView();
dView.setDrawingCacheEnabled(false);
dView.buildDrawingCache();
Bitmap bitmap = Bitmap.createBitmap(dView.getDrawingCache());

2）创建文件路径 保存bitmap（保存到相册根目录->File.separator）

// 首先保存图片
String storePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "HIS";
File appDir = new File(storePath);
if (!appDir.exists()) {
appDir.mkdir();
}
String fileName = System.currentTimeMillis() + ".jpg";
File file = new File(appDir, fileName);

BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, bos);
bos.flush();
bos.close();

3)发送广播通知相册刷新加入这张图片

Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri uri = Uri.fromFile(file);
intent.setData(uri);
activity.sendBroadcast(intent);

4）销毁缓存（不销毁，保存的总是第一张的内容）

dView.destroyDrawingCache();

2、在activity中使用（项目需求是截屏后，显示一下，然后动画退出消失）

case R.id.btn_two:
//截屏
Bitmap screen = ScreenCaptureUtil.getInstance().getScreen(MainActivity.this);
String content = "";
if (null != screen) {
show_screen.setVisibility(View.VISIBLE);
showImage.setImageBitmap(screen);
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scaleanimation);
animation.setFillAfter(true);
showImage.startAnimation(animation);
content = "截屏成功";
} else {
content = "截屏失败";
}
Toast.makeText(MainActivity.this, content, Toast.LENGTH_SHORT).show();
break;

重点：

1）加载动画，并且显示（先判断是否保存成功即bitmap是否等于null）

Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scaleanimation);
animation.setFillAfter(true);
showImage.startAnimation(animation);

2）动画scaleanimation.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:duration="1000"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:pivotX="5%"
android:pivotY="5%"
android:toXScale="0.0"
android:toYScale="0.0" />
</set>

记得添加读写权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />