保存查看到圖像

我有這個類，我想在點擊操作欄時將我的圖形保存到一個jpeg文件。保存查看到圖像

public class SingleTouchActivity extends Activity { 


    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(new SingleTouchEventView(this, null)); 

    // Create ActionBar 
    ActionBar actionBar = getActionBar(); 
    actionBar.show(); 

    } 


    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // ActionBar is clicked 
     switch (item.getItemId()) { 
     case R.id.sig_reset: 
      finish(); 
      Intent sigIntent = new Intent(this, SingleTouchActivity.class); 
      startActivity(sigIntent); 
      break; 
     case R.id.sig_save: 
      //Save to image 
      break; 
     } 
     return true; 
    }

我在網上搜索，我發現這個代碼片段：

view.setDrawingCacheEnabled(true); 
Bitmap b = view.getDrawingCache(); 
b.compress(CompressFormat.JPEG, 95, new FileOutputStream("/some/location/image.jpg"));

這一個：

//createBitmap(int width, int height, Bitmap.Config config) 
// Returns a mutable bitmap with the specified width and height. 
Bitmap image = Bitmap.createBitmap(mapRelativeView.getWidth(), mapRelativeView.getHeight(), Bitmap.Config.RGB_565); 

//draw(Canvas canvas) -- Manually render this view 
//(and all of its children) to the given Canvas. 
yourView.draw(new Canvas(image)); 

//insertImage(ContentResolver cr, Bitmap source, String title, String description) 
// Insert an image and create a thumbnail for it. 
//uri is the path after the image has been saved. 
String uri = Images.Media.insertImage(getContentResolver(), image, "title", null);

的問題是，我SingleTouchActivity集的SingleTouchEventView的內容，和我不我不知道如何定義我的觀點。

來源

2012-11-07 ObAt

所以它的免費手繪圖或別的什麼嗎？ –

是的，我畫了一個簽名 – ObAt

看我的答案，並檢查它並回到我身邊 –

這是免費的手繪示例，您可以在SD卡中繪製任何圖像並保存爲圖像。

下載完整的源代碼格式Here

這是主的OnCreate（）方法，其中該執行一些特定任務。

Like :

檢查路徑存在，如果沒有則設置圖像路徑。
根據當前設置圖像名稱日期&時間。
準備屏幕視圖。
繪製簽名。
存儲在SD卡中。
返回活動位圖圖像，以便它可以設置在圖像視圖。

清除可繪製簽名。

@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
super.onCreate(savedInstanceState); 
this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
setContentView(R.layout.signature); 

// tempDir = Environment.getExternalStorageDirectory() + "/" + getResources().getString(R.string.external_dir) + "/"; 
ContextWrapper cw = new ContextWrapper(getApplicationContext()); 
// File directory = cw.getDir(getResources().getString(R.string.external_dir), Context.MODE_PRIVATE); 

File directory = new File(Environment.getExternalStorageDirectory() + "/Your_Floder_Name");

支票路徑是存在，如果沒有則設置圖像路徑。

if(!directory.exists()) 

directory.mkdir(); //directory is created; 

//prepareDirectory();

設置圖像名稱按當前日期時間&。

uniqueId = getTodaysDate() + "_" + getCurrentTime(); 
current = uniqueId + ".png"; 
mypath= new File(directory,current); 

mContent = (LinearLayout) findViewById(R.id.linearLayout);

抽獎簽名

mSignature = new signature(this, null); 
mSignature.setBackgroundColor(Color.WHITE);

準備屏幕視圖。

mContent.addView(mSignature, LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);

清除可繪製簽名。

mClear = (Button)findViewById(R.id.clear); 
mGetSign = (Button)findViewById(R.id.getsign); 
mGetSign.setEnabled(false); 
mCancel = (Button)findViewById(R.id.cancel); 
mView = mContent;

清除可繪製簽名。

mClear.setOnClickListener(new OnClickListener() 

{ 
public void onClick(View v) 
{ 
Log.v("log_tag", "Panel Cleared"); 
mSignature.clear(); 
mGetSign.setEnabled(false); 
} 
});

抽獎簽名

mGetSign.setOnClickListener(new OnClickListener() 
{ 
public void onClick(View v) 
{ 
Log.v("log_tag", "Panel Saved"); 
// boolean error = captureSignature(); 
// if(error){ 
mView.setDrawingCacheEnabled(true); 
mSignature.save(mView); 
//Bundle b = new Bundle(); 
// b.putString("status", "done"); 
Intent intent = new Intent(Capture.this,SigntuareCaptureActivity.class); 
// intent.putExtra("imagePath",mypath); 
startActivity(intent); 
//intent.putExtra("status", "done"); 
//setResult(RESULT_OK,intent); 
finish(); 
// } 
} 
});

取消，如果不想畫簽名。

mCancel.setOnClickListener(new OnClickListener() 
{ 
public void onClick(View v) 
{ 
Log.v("log_tag", "Panel Canceled"); 
Bundle b = new Bundle(); 
b.putString("status", "cancel"); 
Intent intent = new Intent(); 
intent.putExtras(b); 
setResult(RESULT_OK,intent); 
finish(); 
} 
}); 

}

集圖片名稱隨着當前日期&時間。

private String getTodaysDate() 

{ 

final Calendar c = Calendar.getInstance(); 
int todaysDate = (c.get(Calendar.YEAR) * 10000) + 
((c.get(Calendar.MONTH) + 1) * 100) + 
(c.get(Calendar.DAY_OF_MONTH)); 
Log.w("DATE:",String.valueOf(todaysDate)); 
return(String.valueOf(todaysDate)); 

} 

private String getCurrentTime() 
{ 

final Calendar c = Calendar.getInstance(); 
int currentTime = (c.get(Calendar.HOUR_OF_DAY) * 10000) + 
(c.get(Calendar.MINUTE) * 100) + 
(c.get(Calendar.SECOND)); 
Log.w("TIME:",String.valueOf(currentTime)); 
return(String.valueOf(currentTime)); 

}

檢查你的目錄，如果不存在則創建新

private boolean prepareDirectory() 
{ 
try 
{ 
if (makedirs()) 
{ 
return true; 
} 
else 
{ 
return false; 
} 
} 
catch (Exception e) 
{ 
e.printStackTrace(); 
Toast.makeText(this, "Could not initiate File System.. Is Sdcard mounted properly?", 1000).show(); 
return false; 
} 
} 

private boolean makedirs() 
{ 
File tempdir = new File(tempDir); 
if (!tempdir.exists()) 
tempdir.mkdirs(); 

if (tempdir.isDirectory()) 
{ 
File[] files = tempdir.listFiles(); 
for (File file : files) 
{ 
if (!file.delete()) 
{ 
System.out.println("Failed to delete " + file); 
} 
} 
} 
return (tempdir.isDirectory()); 
}

畫出你的簽名

public class signature extends View 
{ 
private static final float STROKE_WIDTH = 5f; 
private static final float HALF_STROKE_WIDTH = STROKE_WIDTH/2; 
private Paint paint = new Paint(); 
private Path path = new Path(); 

private float lastTouchX; 
private float lastTouchY; 
private final RectF dirtyRect = new RectF(); 

public signature(Context context, AttributeSet attrs) 
{ 
super(context, attrs); 
paint.setAntiAlias(true); 
paint.setColor(Color.BLACK); 
paint.setStyle(Paint.Style.STROKE); 
paint.setStrokeJoin(Paint.Join.ROUND); 
paint.setStrokeWidth(STROKE_WIDTH); 
} 

public void save(View v) 
{ 
Log.v("log_tag", "Width: " + v.getWidth()); 
Log.v("log_tag", "Height: " + v.getHeight()); 
if(mBitmap == null) 
{ 
mBitmap = Bitmap.createBitmap (mContent.getWidth(), mContent.getHeight(), Bitmap.Config.RGB_565); 
} 
Canvas canvas = new Canvas(mBitmap); 
try 
{ 

FileOutputStream mFileOutStream = new FileOutputStream(mypath); 

v.draw(canvas); 
mBitmap.compress(Bitmap.CompressFormat.PNG, 90, mFileOutStream); 
mFileOutStream.flush(); 
mFileOutStream.close(); 
String url = Images.Media.insertImage(getContentResolver(), mBitmap, "title", null); 
//Log.v("log_tag","url: " + url); 

// //In case you want to delete the file 
// boolean deleted = mypath.delete(); 
// Log.v("log_tag","deleted: " + mypath.toString() + deleted); 
// //If you want to convert the image to string use base64 converter 

} 
catch(Exception e) 
{ 
Log.v("log_tag", e.toString()); 
} 
} 

public void clear() 
{ 
path.reset(); 
invalidate(); 
} 

@Override 
protected void onDraw(Canvas canvas) 
{ 
canvas.drawPath(path, paint); 
} 

@Override 
public boolean onTouchEvent(MotionEvent event) 
{ 
float eventX = event.getX(); 
float eventY = event.getY(); 
mGetSign.setEnabled(true); 

switch (event.getAction()) 
{ 
case MotionEvent.ACTION_DOWN: 
path.moveTo(eventX, eventY); 
lastTouchX = eventX; 
lastTouchY = eventY; 
return true; 

case MotionEvent.ACTION_MOVE: 

case MotionEvent.ACTION_UP: 

resetDirtyRect(eventX, eventY); 
int historySize = event.getHistorySize(); 
for (int i = 0; i < historySize; i++) 
{ 
float historicalX = event.getHistoricalX(i); 
float historicalY = event.getHistoricalY(i); 
expandDirtyRect(historicalX, historicalY); 
path.lineTo(historicalX, historicalY); 
} 
path.lineTo(eventX, eventY); 
break; 

default: 
debug("Ignored touch event: " + event.toString()); 
return false; 
} 

invalidate((int) (dirtyRect.left - HALF_STROKE_WIDTH), 
(int) (dirtyRect.top - HALF_STROKE_WIDTH), 
(int) (dirtyRect.right + HALF_STROKE_WIDTH), 
(int) (dirtyRect.bottom + HALF_STROKE_WIDTH)); 

lastTouchX = eventX; 
lastTouchY = eventY; 

return true; 
} 

private void debug(String string) 
{ 
} 

private void expandDirtyRect(float historicalX, float historicalY) 
{ 
if (historicalX < dirtyRect.left) 
{ 
dirtyRect.left = historicalX; 
} 
else if (historicalX > dirtyRect.right) 
{ 
dirtyRect.right = historicalX; 
} 

if (historicalY < dirtyRect.top) 
{ 
dirtyRect.top = historicalY; 
} 
else if (historicalY > dirtyRect.bottom) 
{ 
dirtyRect.bottom = historicalY; 
} 
} 

private void resetDirtyRect(float eventX, float eventY) 
{ 
dirtyRect.left = Math.min(lastTouchX, eventX); 
dirtyRect.right = Math.max(lastTouchX, eventX); 
dirtyRect.top = Math.min(lastTouchY, eventY); 
dirtyRect.bottom = Math.max(lastTouchY, eventY); 
} 
}

如何調用這個類？

上單擊主活動按鈕，

your_button.setOnClickListener(new View.OnClickListener() 
{ 
public void onClick(View view) 
{ 
Intent intent = new Intent(SigntuareCaptureActivity.this, Capture.class); 
startActivity(intent); 
finish(); 

} 
});

來源

2012-11-07 10:57:49

保存查看到圖像

回答

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