如何通过代码而不是程序来截取手机屏幕的选定区域的截图?
当前回答
如果你想从片段中截取截图,请遵循以下步骤:
Override onCreateView(): @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_one, container, false); mView = view; } Logic for taking screenshot: button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { View view = mView.findViewById(R.id.scrollView1); shareScreenShotM(view, (NestedScrollView) view); } method shareScreenShotM)(): public void shareScreenShotM(View view, NestedScrollView scrollView){ bm = takeScreenShot(view,scrollView); //method to take screenshot File file = savePic(bm); // method to save screenshot in phone. } method takeScreenShot(): public Bitmap takeScreenShot(View u, NestedScrollView z){ u.setDrawingCacheEnabled(true); int totalHeight = z.getChildAt(0).getHeight(); int totalWidth = z.getChildAt(0).getWidth(); Log.d("yoheight",""+ totalHeight); Log.d("yowidth",""+ totalWidth); u.layout(0, 0, totalWidth, totalHeight); u.buildDrawingCache(); Bitmap b = Bitmap.createBitmap(u.getDrawingCache()); u.setDrawingCacheEnabled(false); u.destroyDrawingCache(); return b; } method savePic(): public static File savePic(Bitmap bm){ ByteArrayOutputStream bytes = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.JPEG, 100, bytes); File sdCardDirectory = new File(Environment.getExternalStorageDirectory() + "/Foldername"); if (!sdCardDirectory.exists()) { sdCardDirectory.mkdirs(); } // File file = new File(dir, fileName); try { file = new File(sdCardDirectory, Calendar.getInstance() .getTimeInMillis() + ".jpg"); file.createNewFile(); new FileOutputStream(file).write(bytes.toByteArray()); Log.d("Fabsolute", "File Saved::--->" + file.getAbsolutePath()); Log.d("Sabsolute", "File Saved::--->" + sdCardDirectory.getAbsolutePath()); } catch (IOException e) { e.printStackTrace(); } return file; }
对于activity,您可以简单地使用View v1 = getWindow().getDecorView().getRootView();而不是mView
其他回答
捷径是
FrameLayout layDraw = (FrameLayout) findViewById(R.id.layDraw); /*Your root view to be part of screenshot*/
layDraw.buildDrawingCache();
Bitmap bmp = layDraw.getDrawingCache();
对于那些想要捕获GLSurfaceView的人,getDrawingCache或绘制到画布方法将不起作用。
在帧呈现之后,您必须读取OpenGL帧缓冲区的内容。这里有一个很好的答案
下面是允许我的截图存储在SD卡上的代码,以后无论你需要什么都可以使用:
首先,你需要添加一个适当的权限来保存文件:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
这是代码(运行在一个活动中):
private void takeScreenshot() {
Date now = new Date();
android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);
try {
// image naming and path to include sd card appending name you choose for file
String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";
// create bitmap screen capture
View v1 = getWindow().getDecorView().getRootView();
v1.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
File imageFile = new File(mPath);
FileOutputStream outputStream = new FileOutputStream(imageFile);
int quality = 100;
bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
outputStream.flush();
outputStream.close();
openScreenshot(imageFile);
} catch (Throwable e) {
// Several error may come out with file handling or DOM
e.printStackTrace();
}
}
这是你如何打开最近生成的图像:
private void openScreenshot(File imageFile) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(imageFile);
intent.setDataAndType(uri, "image/*");
startActivity(intent);
}
如果你想在片段视图上使用这个,那么使用:
View v1 = getActivity().getWindow().getDecorView().getRootView();
而不是
View v1 = getWindow().getDecorView().getRootView();
on takeScreenshot()函数
注意:
如果对话框包含一个表面视图,这个解决方案就不起作用。详情请查看以下问题的答案:
Android界面截图显示黑屏
我的解决方案是:
public static Bitmap loadBitmapFromView(Context context, View v) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
v.measure(MeasureSpec.makeMeasureSpec(dm.widthPixels, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(dm.heightPixels, MeasureSpec.EXACTLY));
v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
Bitmap returnedBitmap = Bitmap.createBitmap(v.getMeasuredWidth(),
v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(returnedBitmap);
v.draw(c);
return returnedBitmap;
}
and
public void takeScreen() {
Bitmap bitmap = ImageUtils.loadBitmapFromView(this, view); //get Bitmap from the view
String mPath = Environment.getExternalStorageDirectory() + File.separator + "screen_" + System.currentTimeMillis() + ".jpeg";
File imageFile = new File(mPath);
OutputStream fout = null;
try {
fout = new FileOutputStream(imageFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fout);
fout.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
fout.close();
}
}
图像保存在外部存储文件夹中。
你可以尝试这样做,
从布局或视图中获取位图缓存 首先你需要setDrawingCacheEnabled到一个布局(线性布局或相对布局,或视图)
然后
Bitmap bm = layout.getDrawingCache()
然后对位图做任何你想做的事情。要么将其转换为图像文件,要么将位图的uri发送到其他地方。
推荐文章
- 改变开关的“开”色
- 以编程方式将EditText的输入类型从PASSWORD更改为NORMAL,反之亦然
- 如何在隐藏和查看密码之间切换
- 在Android上调整一个大的位图文件到缩放输出文件
- 如何更改Android版本和代码版本号?
- Android Studio突然无法解析符号
- 应用程序重新启动而不是恢复
- 如何设置整个应用程序在纵向模式?
- Android中文本的阴影效果?
- 以编程方式设置TextView的布局权重
- Android -如何覆盖“后退”按钮,所以它不完成()我的活动?
- 如何从通知点击发送参数到一个活动?
- 导航目标xxx对于这个NavController是未知的
- 使用ConstraintLayout均匀间距的视图
- 文件google-services错误。模块根文件夹中缺少Json。谷歌服务插件没有它就不能正常工作。