我正在编写一个应用程序,用户可以在其中从图库中选择一个图像,并且可以使用 DrawingSurface 在其上画笔,现在我想以编程方式获取 View 的屏幕截图。我已经完成了一个 Activity 的屏幕截图,但我无法截取 DrawingSurface 的屏幕截图。下面是我的 XML 代码
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Holi_app.in.DrawingSurface
android:id="@+id/drawingSurface"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
</LinearLayout>
</RelativeLayout>
这是我的 Java 类
public class DrawingSurface extends SurfaceView implements SurfaceHolder.Callback
{
private Boolean _run;
protected DrawThread thread;
Bitmap mBitmap;
Context context;
int flag=0;
String mImagePath;
File file;
String savedFilePath = "";
private boolean isFileAlreadySaved = false;
private CommandManager commandManager;
private Canvas canvas;
SurfaceView v;
public DrawingSurface(Context context, AttributeSet attrs)
{
super(context, attrs);
String tag=PreferenceConnector.readString(context, PreferenceConnector.IMAGE_TAG,"ab");
if(tag.equals("ab"))
{
mBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.abdraw);
}
getHolder().addCallback(this);
commandManager = new CommandManager();
thread = new DrawThread(getHolder());
}
class DrawThread extends Thread
{
private SurfaceHolder mSurfaceHolder;
public DrawThread(SurfaceHolder surfaceHolder)
{
mSurfaceHolder = surfaceHolder;
}
public void setRunning(boolean run)
{
_run = run;
}
DrawingActivity image=new DrawingActivity();
@Override
public void run()
{
Canvas canvas = null;
while (_run)
{
try
{
canvas = mSurfaceHolder.lockCanvas(null);
canvas.drawBitmap(mBitmap, 0, 0, null);
commandManager.executeAll(canvas);
mSurfaceHolder.unlockCanvasAndPost(canvas);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
public void addDrawingPath (DrawingPath drawingPath)
{
commandManager.addCommand(drawingPath);
}
public boolean hasMoreRedo()
{
return commandManager.hasMoreRedo();
}
public void redo()
{
commandManager.redo();
}
public void undo()
{
commandManager.undo();
}
public boolean hasMoreUndo()
{
return commandManager.hasMoreRedo();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
// TODO Auto-generated method stub
}
public void surfaceCreated(SurfaceHolder holder)
{
// TODO Auto-generated method stub
thread.setRunning(true);
thread.start();
}
public void surfaceDestroyed(SurfaceHolder holder)
{
// TODO Auto-generated method stub
boolean retry = true;
thread.setRunning(false);
while (retry)
{
try
{
thread.join();
retry = false;
}
catch (InterruptedException e)
{
// we will try it again and again...
}
}
}
public void Save(String mImagePath, String savedFilePath2)
{
this.mImagePath=mImagePath;
this.savedFilePath=savedFilePath2;
System.out.println("here imagepath"+mImagePath);
if(isFileAlreadySaved == false)
{
this.setDrawingCacheEnabled(true);
mBitmap=getDrawingCache();
Calendar currentDate = Calendar.getInstance();
SimpleDateFormat formatter= new SimpleDateFormat("yyyyMMMddHmmss");
String dateNow = formatter.format(currentDate.getTime());
file = new File(savedFilePath);
FileOutputStream fos;
try {
fos = new FileOutputStream(file);
mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
isFileAlreadySaved = true;
}
catch (FileNotFoundException e)
{
Log.e("Panel", "FileNotFoundException", e);
}
catch (IOException e) {
Log.e("Panel", "IOEception", e);
}
}
}
}
最佳答案
试试这个
GameBoard gameBoard = (GameBoard)findViewById(R.id.the_canvas);
gameBoard.save();
View类的GameBoard名称
public void save() {
// TODO Auto-generated method stub
// File folder = new File(Environment.getExternalStorageDirectory()+"/folder/");
// if(!folder.exists()) folderAppointment.mkdirs();
flag=false;
try {
this.setDrawingCacheEnabled(true);
FileOutputStream fos = new FileOutputStream(new File(Environment.getExternalStorageDirectory()+"/filetosave4.jpg"));
mBitmap = this.getDrawingCache();
mBitmap.compress(CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
// Toast.makeText(getContext(), "Saved to "+fos, Toast.LENGTH_LONG).show();
next();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
Log.d("Flag",""+flag);
}
}
也试试这个
private void saveBitmap(File file) {
try {
FileOutputStream fos = new FileOutputStream(file);
Bitmap bitmap = context.getSurface().getBitmap();
if (bitmap == null) {
return;
}
bitmap.compress(CompressFormat.PNG, 100, fos);
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
}
}
关于android - 如何以编程方式截取绘图表面的屏幕截图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15130890/