如何通过任何程序而不是代码来截取手机屏幕的选定区域?
这是允许我的屏幕截图存储在SD卡上的代码,以后用于满足您的任何需求:
首先,您需要添加适当的权限来保存文件:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
这是代码(在Activity中运行):
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();
}
}
这就是你打开最近生成的图像的方法:
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);
}
如果要在片段视图上使用它,请使用:
View v1 = getActivity().getWindow().getDecorView().getRootView();
代替
View v1 = getWindow().getDecorView().getRootView();
on takeScreenshot()函数
注意:
如果对话框包含曲面视图,则此解决方案不起作用。有关详细信息,请检查以下问题的答案:
您可以尝试以下库:http://code.google.com/p/android-screenshot-library/ Android屏幕截图库(ASL)支持以编程方式从Android设备捕获屏幕截图,而无需具有root访问权限。相反,ASL使用在后台运行的本机服务,每次设备启动时通过Android调试桥(ADB)启动一次。
public class ScreenShotActivity extends Activity{
private RelativeLayout relativeLayout;
private Bitmap myBitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
relativeLayout = (RelativeLayout)findViewById(R.id.relative1);
relativeLayout.post(new Runnable() {
public void run() {
//take screenshot
myBitmap = captureScreen(relativeLayout);
Toast.makeText(getApplicationContext(), "Screenshot captured..!", Toast.LENGTH_LONG).show();
try {
if(myBitmap!=null){
//save image to SD card
saveImage(myBitmap);
}
Toast.makeText(getApplicationContext(), "Screenshot saved..!", Toast.LENGTH_LONG).show();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
public static Bitmap captureScreen(View v) {
Bitmap screenshot = null;
try {
if(v!=null) {
screenshot = Bitmap.createBitmap(v.getMeasuredWidth(),v.getMeasuredHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(screenshot);
v.draw(canvas);
}
}catch (Exception e){
Log.d("ScreenShotActivity", "Failed to capture screenshot because:" + e.getMessage());
}
return screenshot;
}
public static void saveImage(Bitmap bitmap) throws IOException{
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 40, bytes);
File f = new File(Environment.getExternalStorageDirectory() + File.separator + "test.png");
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
fo.close();
}
}
添加许可
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
基于@JustinMorris上面的答案和@NiravDangi这里https://stackoverflow.com/a/8504958/2232148我们必须采取视图的背景和前景并组装它们如下:
public static Bitmap takeScreenshot(View view, Bitmap.Config quality) {
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), quality);
Canvas canvas = new Canvas(bitmap);
Drawable backgroundDrawable = view.getBackground();
if (backgroundDrawable != null) {
backgroundDrawable.draw(canvas);
} else {
canvas.drawColor(Color.WHITE);
}
view.draw(canvas);
return bitmap;
}
quality参数采用Bitmap.Config的常量,通常是Bitmap.Config.RGB_565
或Bitmap.Config.ARGB_8888
。
你可以尝试做这样的事情,
通过执行类似首先获得setDrawingCacheEnabled
到布局(线性布局或相对布局或视图)的方式从布局或视图获取位图缓存
然后
Bitmap bm = layout.getDrawingCache()
然后用位图做任何你想做的事。将其转换为图像文件,或将位图的uri发送到其他地方。
对于那些想要捕获GLSurfaceView的人来说,getDrawingCache或绘图到画布方法将不起作用。
渲染帧后,您必须阅读OpenGL帧缓冲区的内容。有一个很好的答案here
简短的方法是
FrameLayout layDraw = (FrameLayout) findViewById(R.id.layDraw); /*Your root view to be part of screenshot*/
layDraw.buildDrawingCache();
Bitmap bmp = layDraw.getDrawingCache();
我创建了一个简单的库,它从View
获取屏幕截图,并为您提供Bitmap对象或将其直接保存到您想要的任何路径
如果你想从fragment
截取屏幕截图,请按照以下步骤操作:
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;
}
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View view = mView.findViewById(R.id.scrollView1);
shareScreenShotM(view, (NestedScrollView) view);
}
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.
}
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;
}
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;
}
对于活动,您可以简单地使用View v1 = getWindow().getDecorView().getRootView();
而不是mView
只是扩展taraloca的答案。您必须添加以下行才能使其正常工作。我已将图像名称设为静态。如果您需要动态图像名称,请确保使用taraloca的时间戳变量。
// Storage Permissions
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
private void verifyStoragePermissions() {
// Check if we have write permission
int permission = ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, REQUEST_EXTERNAL_STORAGE);
}else{
takeScreenshot();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (requestCode == REQUEST_EXTERNAL_STORAGE) {
takeScreenshot();
}
}
}
并且在AndroidManifest.xml文件中,以下条目必须:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
参数视图是根布局对象。
public static Bitmap screenShot(View view) {
Bitmap bitmap = null;
if (view.getWidth() > 0 && view.getHeight() > 0) {
bitmap = Bitmap.createBitmap(view.getWidth(),
view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
}
return bitmap;
}
调用此方法,传入您想要屏幕截图的最外层ViewGroup:
public Bitmap screenShot(View view) {
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
view.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
return bitmap;
}
此问题的大部分答案都使用Canvas
绘图方法或绘图缓存方法。但是,View.setDrawingCache()
method is deprecated in API 28。目前推荐的用于制作屏幕截图的API是API 24提供的PixelCopy
类(但接受Window
参数的方法可从API 26 == Android 8.0 Oreo获得)。以下是用于检索Bitmap
的示例Kotlin代码:
@RequiresApi(Build.VERSION_CODES.O)
fun saveScreenshot(view: View) {
val window = (view.context as Activity).window
if (window != null) {
val bitmap = Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
val locationOfViewInWindow = IntArray(2)
view.getLocationInWindow(locationOfViewInWindow)
try {
PixelCopy.request(window, Rect(locationOfViewInWindow[0], locationOfViewInWindow[1], locationOfViewInWindow[0] + view.width, locationOfViewInWindow[1] + view.height), bitmap, { copyResult ->
if (copyResult == PixelCopy.SUCCESS) {
saveBitmap(bitmap)
}
// possible to handle other result codes ...
}, Handler())
} catch (e: IllegalArgumentException) {
// PixelCopy may throw IllegalArgumentException, make sure to handle it
}
}
}
除了捕获屏幕截图,如果我们也想播放音调。我们可以使用以下代码
MediaPlayer _shootMP = null;
AudioManager manager = (AudioManager)
getActivity().getSystemService(Context.AUDIO_SERVICE);
manager.setStreamVolume(AudioManager.STREAM_NOTIFICATION,
manager.getStreamMaxVolume(AudioManager.STREAM_MUSIC), 0);
if (_shootMP == null)
_shootMP = MediaPlayer
.create(getActivity(),
Uri.parse("file:///system/media/audio/ui/camera_click.ogg"));
if (_shootMP != null) {
try {
_shootMP.start();
_shootMP.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer arg0) {
// release the media
_shootMP.stop();
_shootMP.reset();
_shootMP.release();
_shootMP = null;
}
});
} catch (IllegalStateException e) {
Log.w(TAG, "Exception takeScreenShot" + e.getMessage());
}
}
仅限系统应用程序!
Process process;
process = Runtime.getRuntime().exec("screencap -p " + outputPath);
process.waitFor();
注意:系统应用程序不需要运行“su”来执行此命令。
在android中截取视图的截图。
public static Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
对于整页滚动屏幕截图
如果要捕获完整的View屏幕截图(其中包含一个左右的滚动视图),请检查此库
您所要做的就是导入Gradle,并创建一个Big Screenshot对象
BigScreenshot longScreenshot = new BigScreenshot(this, x, y);
将自动滚动屏幕视图组并在最后组装在一起时,将收到带有截图的位图的回调。
@Override public void getScreenshot(Bitmap bitmap) {}
哪些可以保存到图库或者其他任何使用都是必要的
如果你想捕获像RelativeLayout或LinearLayout等视图或布局,只需使用代码:
LinearLayout llMain = (LinearLayout) findViewById(R.id.linearlayoutMain);
Bitmap bm = loadBitmapFromView(llMain);
现在您可以通过以下方式将此位图保存在设备存储上:
FileOutputStream outStream = null;
File f=new File(Environment.getExternalStorageDirectory()+"/Screen Shots/");
f.mkdir();
String extStorageDirectory = f.toString();
File file = new File(extStorageDirectory, "my new screen shot");
pathOfImage = file.getAbsolutePath();
try {
outStream = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.PNG, 100, outStream);
Toast.makeText(getApplicationContext(), "Saved at "+f.getAbsolutePath(), Toast.LENGTH_LONG).show();
addImageGallery(file);
//mail.setEnabled(true);
flag=true;
} catch (FileNotFoundException e) {e.printStackTrace();}
try {
outStream.flush();
outStream.close();
} catch (IOException e) {e.printStackTrace();}
注意:仅适用于root电话
以编程方式,您可以运行adb shell /system/bin/screencap -p /sdcard/img.png
如下
Process sh = Runtime.getRuntime().exec("su", null,null);
OutputStream os = sh.getOutputStream();
os.write(("/system/bin/screencap -p " + "/sdcard/img.png").getBytes("ASCII"));
os.flush();
os.close();
sh.waitFor();
然后阅读img.png
作为Bitmap
并使用您的愿望。
编辑:怜悯downvotes。 2010年,当我回答这个问题时,情况确实如此。
所有允许截图的程序仅适用于有根电话。
此方法不需要root权限或不需要大编码。
在使用以下命令的adb shell上,您可以拍摄屏幕截图。
input keyevent 120
这个命令不需要任何root权限,所以你也可以从android应用程序的java代码执行。
Process process;
process = Runtime.getRuntime().exec("input keyevent 120");
有关android中的keyevent代码的更多信息,请参阅http://developer.android.com/reference/android/view/KeyEvent.html
我们在这里使用过。 KEYCODE_SYSRQ其值为120,用于系统请求/打印屏幕键。
正如CJBS所说,输出图片将保存在/ sdcard / Pictures / Screenshots中
Mualig的回答非常好,但我有同样的问题Ewoks描述,我没有得到背景。所以有时候足够好,有时我会在黑色背景上得到黑色文字(取决于主题)。
这个解决方案主要基于Mualig代码和我在Robotium中找到的代码。我通过直接调用draw方法来放弃使用绘图缓存。在此之前,我将尝试从当前活动中获取可绘制的背景以首先绘制它。
// Some constants
final static String SCREENSHOTS_LOCATIONS = Environment.getExternalStorageDirectory().toString() + "/screenshots/";
// Get device dimmensions
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
// Get root view
View view = mCurrentUrlMask.getRootView();
// Create the bitmap to use to draw the screenshot
final Bitmap bitmap = Bitmap.createBitmap(size.x, size.y, Bitmap.Config.ARGB_4444);
final Canvas canvas = new Canvas(bitmap);
// Get current theme to know which background to use
final Activity activity = getCurrentActivity();
final Theme theme = activity.getTheme();
final TypedArray ta = theme
.obtainStyledAttributes(new int[] { android.R.attr.windowBackground });
final int res = ta.getResourceId(0, 0);
final Drawable background = activity.getResources().getDrawable(res);
// Draw background
background.draw(canvas);
// Draw views
view.draw(canvas);
// Save the screenshot to the file system
FileOutputStream fos = null;
try {
final File sddir = new File(SCREENSHOTS_LOCATIONS);
if (!sddir.exists()) {
sddir.mkdirs();
}
fos = new FileOutputStream(SCREENSHOTS_LOCATIONS
+ System.currentTimeMillis() + ".jpg");
if (fos != null) {
if (!bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos)) {
Log.d(LOGTAG, "Compress/Write failed");
}
fos.flush();
fos.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
private void captureScreen() {
View v = getWindow().getDecorView().getRootView();
v.setDrawingCacheEnabled(true);
Bitmap bmp = Bitmap.createBitmap(v.getDrawingCache());
v.setDrawingCacheEnabled(false);
try {
FileOutputStream fos = new FileOutputStream(new File(Environment
.getExternalStorageDirectory().toString(), "SCREEN"
+ System.currentTimeMillis() + ".png"));
bmp.compress(CompressFormat.PNG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
在清单中添加权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
如需支持Marshmallow或更高版本,请在活动onCreate方法中添加以下代码
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},00);
作为参考,捕获屏幕(而不仅仅是您的应用程序活动)的一种方法是捕获帧缓冲区(设备/ dev / graphics / fb0)。为此,您必须具有root权限,或者您的应用必须是signature permissions的应用程序(“仅当请求的应用程序使用与声明权限的应用程序相同的证书进行签名时系统授予的权限”) - 这非常除非你编译自己的ROM,否则不太可能
从我测试过的几个设备中捕获的每个帧缓冲区都只包含一个屏幕截图。人们已经报道它包含更多,我想这取决于帧/显示尺寸。
我试图连续读取帧缓冲区,但它似乎返回固定数量的字节读取。在我的情况下是(3 410 432)字节,这足以存储854 * 480 RGBA(3 279 360字节)的显示帧。是的,从fb0输出的二进制帧是我设备中的RGBA。这很可能取决于设备。这对你解码它很重要=)
在我的设备/ dev / graphics / fb0中,权限是只有root和组图形用户才能读取fb0。
graphics是一个受限制的组,因此您可能只能使用su命令使用root电话访问fb0。
Android应用具有用户ID(uid)= app _ ##和组ID(guid)= app _ ##。
adb shell有uid = shell和guid = shell,它拥有比应用程序更多的权限。您可以在/system/permissions/platform.xml中实际检查这些权限
这意味着您将能够在没有root的情况下读取adb shell中的fb0,但是如果没有root,您将无法在app中读取它。
此外,在AndroidManifest.xml上提供READ_FRAME_BUFFER和/或ACCESS_SURFACE_FLINGER权限对常规应用程序无效,因为这些仅适用于“签名”应用程序。
另请查看此closed thread了解更多详情。
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;
}
和
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。