将签名的图片保存到Android上的Rhodes文件中
我正在尝试使用定位到Android选项卡的Rhodes实现签名捕获。 我已经设法得到canvas和涂鸦。 但是我无法将签名保存在所需的位置。 signature_uri的默认位置是db/db-files/Image-XXXXXX.png 。
这是示例示例中的代码：
def signature_callback if @params['status'] == 'ok' #create signature record in the DB signature = SignatureUtil.new({'signature_uri'=>@params['signature_uri']}) signature.save puts "new Signature object: " + signature.inspect end
在控制台中我得到了 ：
APP| RHO serve: /app/Settings/signature_callback I/APP ( 801): I 01/26/2012 11:36:20:236 0000032e APP| Params: {"status"=>"ok", "signature_uri"=>"db/db-files/Image_20120126113618375.png", "rho_callback"=>"1"} I/APP ( 801): I 01/26/2012 11:36:20:238 0000032e APP| *******************ok**************** I/APP ( 801): I 01/26/2012 11:36:20:238 0000032e APP| %%%%%%%%%%%%%%%%%db/db-files/Image_20120126113618375.png%%%%%%%%%%% I/APP ( 801): I 01/26/2012 11:36:20:239 0000032e APP| App error: can't convert Symbol into Integer I/APP ( 801): lib/rhom/rhom_object_factory.rb:67:in `[]' I/APP ( 801): lib/rhom/rhom_object_factory.rb:67:in `initialize' I/APP ( 801): apps/app/Settings/controller.rb:34:in `new' I/APP ( 801): apps/app/Settings/controller.rb:34:in `signature_callback' I/APP ( 801): lib/rho/rhocontroller.rb:91:in `serve' I/APP ( 801): lib/rho/rhoapplication.rb:209:in `serve' I/APP ( 801): lib/rho/rho.rb:822:in `serve' I/APP ( 801): E 01/26/2012 11:36:20:248 00000321 Net| Request failed. HTTP Code: 500 returned. HTTP Response: <html> I/APP ( 801): <head> I/APP ( 801): <meta name="viewport" content="width=320"/> I/APP ( 801): </head> I/APP ( 801): <body> I/APP ( 801): <h2>Server Error</h2> I/APP ( 801): <p> I/APP ( 801): Error: can't convert Symbol into Integer<br/>Trace: <br/
现在，而不是这个数据库存储，我想将其保存在所需的位置。 请分享您的观点。
你检查了这个页面： http : //docs.rhomobile.com/rhodes/device-caps#file-system-access ？ 它看起来像我需要将图像保存到数据库，并使用Rho :: RhoApplication :: get_blob_path（image.image_uri）方法来打开文件。 然后，您应该能够使用文件系统API创build一个新文件，并将图像的内容写入到您select的位置。
只要尝试在签名uri中传递SD卡的位置。 请注意在清单中给予sd卡的读写权限。
其他
将签名文件复制到来自内部包的所需位置，但这是工作的重复。
下面的代码可能对你有用
import java.io.File; import java.io.FileOutputStream; import java.util.Calendar; import android.app.Activity; import android.content.Context; import android.content.ContextWrapper; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.RectF; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore.Images; import android.util.AttributeSet; import android.util.Log; import android.view.Gravity; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup.LayoutParams; import android.view.Window; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.Toast; public class CaptureSignature extends Activity { LinearLayout mContent; signature mSignature; Button mClear, mGetSign, mCancel; public static String tempDir; public int count = 1; public String current = null; private Bitmap mBitmap; View mView; File mypath; private String uniqueId; private EditText yourName; @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); prepareDirectory(); uniqueId = getTodaysDate() + "_" + getCurrentTime() + "_" + Math.random(); current = uniqueId + ".png"; mypath= new File(directory,current); mContent = (LinearLayout) findViewById(R.id.linearLayout); mSignature = new signature(this, null); mSignature.setBackgroundColor(Color.WHITE); mContent.addView(mSignature, LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); mClear = (Button)findViewById(R.id.clear); mGetSign = (Button)findViewById(R.id.getsign); mGetSign.setEnabled(false); mCancel = (Button)findViewById(R.id.cancel); mView = mContent; yourName = (EditText) findViewById(R.id.yourName); mClear.setOnClickListener(new OnClickListener() { public void onClick(View v) { Log.v("log_tag", "Panel Cleared"); mSignature.clear(); mGetSign.setEnabled(false); } }); 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(); intent.putExtras(b); setResult(RESULT_OK,intent); finish(); } } }); 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(); } }); } @Override protected void onDestroy() { Log.w("GetSignature", "onDestory"); super.onDestroy(); } private boolean captureSignature() { boolean error = false; String errorMessage = ""; if(yourName.getText().toString().equalsIgnoreCase("")){ errorMessage = errorMessage + "Please enter your Name\n"; error = true; } if(error){ Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT); toast.setGravity(Gravity.TOP, 105, 50); toast.show(); } return error; } 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)); } 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()); } 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); } }
}
