The problem of save image file

NeoLiu · by **NeoLiu** » Tue Jan 15, 2008 5:41 am

Hi guys

i am affliction of the problem of save image file

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public void OutPutPicture(Context context)
 
    {  
 
                FileOutputStream fOut = null;
 
                try {
 
                        fOut = context.openFileOutput("pic1.png", Context.MODE_PRIVATE);
 
                } catch (FileNotFoundException e) {
 
                        e.printStackTrace();
 
                }
 
                mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
 
        try {
 
                fOut.flush();
 
                } catch (IOException e) {
 
                        e.printStackTrace();
 
                }
 
        try {
 
                fOut.close();
 
                } catch (IOException e) {
 
                        e.printStackTrace();
 
                }       
 
    }
Parsed in 0.032 seconds,  using GeSHi 1.0.8.4

but catch FileNotFoundException, fOut is null.
i don't why the fOut is null

plusminus · by **plusminus** » Tue Jan 15, 2008 11:46 pm

Hello NeoLiu,

your code looks correct. Did you try to place the saving part right into the onCreate() of an empty Activity :?:
Where does your context-parameter come from (Hint: Activity extends Context!) :?:

Regards,
plusminus

NeoLiu · by **NeoLiu** » Wed Jan 16, 2008 4:27 am

Hi plusminus

I tested the code into a empty activity onCreate();

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package com.google.android.test;
 
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
 
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
 
public class Test extends Activity {
    /** Called when the activity is first created. */
        private static Bitmap BitmapA;
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        
        BitmapA = Bitmap.createBitmap(320, 320, true);
        OutPutPicture();
    }
    
    public void OutPutPicture()
    {  
          FileOutputStream fOut = null;
          try {
               fOut = openFileOutput("pic1.png", MODE_PRIVATE);
          } catch (FileNotFoundException e) {
               e.printStackTrace();
          }
          
          BitmapA.compress(Bitmap.CompressFormat.PNG, 100, fOut);
 
        try {
          fOut.flush();
          } catch (IOException e) {
               e.printStackTrace();
          }
        try {
          fOut.close();
          } catch (IOException e) {
               e.printStackTrace();
          }   
    }
}
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

that is OK,

but same code in my app fOut is null

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OutPutPicture(Context context)
{
}
Parsed in 0.033 seconds,  using GeSHi 1.0.8.4

in my view.java
the context-parameter is come from Activity.java

now i modify the code put the OutPutPicture() into Activity.java
failed, the fOut is null

plusminus · by **plusminus** » Wed Jan 16, 2008 5:31 pm

Hello NeoLiu,

sounds strange, post your whole View-Class plus the line where you create it (like: new MyView(this, ...) ).
I'll have a look.

Regards,
plusminus

NeoLiu · by **NeoLiu** » Wed Jan 16, 2008 6:15 pm

ImagePS.java

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package com.google.android.imageps;
 
import android.app.Activity;
 
import android.app.AlertDialog;
 
import android.os.Bundle;
 
import android.text.Layout;
 
import android.view.KeyEvent;
 
import android.view.Menu;
 
import android.view.View;
 
import android.view.Window;
 
import android.widget.AdapterView;
 
import android.widget.BaseAdapter;
 
import android.widget.Gallery;
 
import java.io.FileNotFoundException;
 
import java.io.FileOutputStream;
 
import java.io.IOException;
 
import java.util.ArrayList;
 
import android.content.*;
 
import android.content.DialogInterface.OnClickListener;
 
import android.view.*;
 
import android.widget.*;
 
import android.widget.Gallery.LayoutParams;
 
import android.graphics.Bitmap;
 
import android.graphics.drawable.Drawable; 
 
//Need the following import to get access to the app resources, since this
 
//class is in a sub-package.
 
/**
 
 * Demonstrates the handling of touch screen events to implement a simple
 
 * painting app.
 
 */
 
public class ImagePS extends Activity{ 
 
        private static ImagePSView mImagePSView;
 
        private static Bundle extras;
 
        private static final int MENU_SAVE = Menu.FIRST;
 
    @Override
 
    protected void onCreate(Bundle icicle) {
 
        super.onCreate(icicle);
 
        extras = getIntent().getExtras();
 
        requestWindowFeature(Window.FEATURE_NO_TITLE);
 
        mImagePSView = new ImagePSView(this, extras);
 
        setContentView(mImagePSView);
 
    }
 
    public boolean onCreateOptionsMenu(Menu menu) {
 
                super.onCreateOptionsMenu(menu);
 
                menu.add(0, MENU_SAVE, R.string.menu_save);
 
                return true;
 
        }
 
        public boolean onOptionsItemSelected(Menu.Item item) {
 
                switch (item.getId()) {
 
                case MENU_SAVE:
 
                        OutPutPicture();
 
                        return true;
 
                }
 
                return super.onOptionsItemSelected(item);
 
        }
 
        public void OutPutPicture()
 
    {  
 
                FileOutputStream fOut = null;
 
                try {
 
                        fOut = openFileOutput("pic1.png", MODE_PRIVATE);
 
                } catch (FileNotFoundException e) {
 
                        e.printStackTrace();
 
                }
 
                mImagePSView.mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
 
        try {
 
                fOut.flush();
 
                } catch (IOException e) {
 
                        e.printStackTrace();
 
                }
 
        try {
 
                fOut.close();
 
                } catch (IOException e) {
 
                        e.printStackTrace();
 
                }       
 
    }
 
}
Parsed in 0.044 seconds,  using GeSHi 1.0.8.4

ImagePSView.java

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package com.google.android.imageps;
 
import java.io.File;
 
import java.io.FileInputStream;
 
import java.io.FileNotFoundException;
 
import java.io.FileOutputStream;
 
import java.io.IOException;
 
import java.io.OutputStream;
 
import android.content.Context;
 
import android.content.Resources;
 
import android.graphics.Bitmap;
 
import android.graphics.BitmapFactory;
 
import android.graphics.Canvas;
 
import android.graphics.Color;
 
import android.graphics.Paint;
 
import android.graphics.Rect;
 
import android.graphics.drawable.BitmapDrawable;
 
import android.graphics.drawable.Drawable;
 
import android.os.Bundle;
 
import android.view.KeyEvent;
 
import android.view.MotionEvent;
 
import android.view.View;
 
public class ImagePSView extends View{
 
    Bitmap mBitmap;
 
    Canvas mCanvas;
 
    private final Rect mRect = new Rect();
 
    private final Paint mPaint;
 
    private boolean mCurDown;
 
    private int mCurX;
 
    private int mCurY;
 
    private float mCurPressure;
 
    private float mCurSize;
 
    private int mCurWidth;
 
        private static final int maxEditHeight = 459;
 
        private static final int maxEditWidth = 320;
 
        private static Bitmap BitmapA;
 
    private static FileOutputStream fOut;
 
    private static BitmapDrawable bmD;
 
    private static int Rcolor = 0;
 
    private static int Gcolor = 0;
 
    private static int Bcolor = 0;
 
    int maxScrollX = 0;
 
    int maxScrollY = 0;
 
    int remainX = 0;
 
    int remainY = 0;
 
    boolean isScrollBy = false;
 
    private static int leftBound = 0;
 
    private static int topBound = 0;
 
    private static int picHeight = 0;
 
    private static int picWidth = 0;
 
    public ImagePSView(Context c, Bundle extras) {
 
        super(c);
 
        mPaint = new Paint();
 
        mPaint.setAntiAlias(true);
 
        mPaint.setARGB(255, 255, 255, 255);
 
        String path = extras.getString("filepath");
 
        BitmapA = BitmapFactory.decode(path);
 
        bmD =  new BitmapDrawable(BitmapA);
 
        loadPic(bmD);
 
    }
 
    public void loadPic(Drawable Pic) {
 
        picHeight = Pic.getIntrinsicHeight();
 
        picWidth = Pic.getIntrinsicWidth();
 
        leftBound = 0;
 
        topBound = 0;
 
        isScrollBy = false;
 
        int editWidth = picWidth;
 
        int editHeight = picHeight;
 
        isScrollBy = true;
 
        Bitmap bitmap = Bitmap.createBitmap(320, 459, true);
 
        Canvas canvas = new Canvas(bitmap);
 
        Pic.setBounds(0, 0, 320, 459);
 
        Pic.draw(canvas);
 
        mBitmap = bitmap;
 
        mCanvas = canvas;
 
    }
 
    @Override
 
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
 
       /* int curW = mBitmap != null ? mBitmap.width() : 0;
 
        int curH = mBitmap != null ? mBitmap.height() : 0;
 
        if (curW >= w && curH >= h) {
 
            return;
 
        }
 
        if (curW < w) curW = w;
 
        if (curH < h) curH = h;
 
        Bitmap newBitmap = Bitmap.createBitmap(this.getWidth(), this.getHeight(), false);
 
        Canvas newCanvas = new Canvas();
 
        newCanvas.setDevice(newBitmap);
 
        if (mBitmap != null) {
 
            newCanvas.drawBitmap(mBitmap, 0, 0, null);
 
        }
 
        mBitmap = newBitmap;
 
        mCanvas = newCanvas;*/
 
    }
 
    @Override
 
    protected void onDraw(Canvas canvas) {
 
        if (mBitmap != null) {
 
            canvas.drawBitmap(mBitmap, 0, 0, null);
 
            //canvas.drawBitmap(BitmapA, 0, 0, null);
 
        }
 
    }
 
}
Parsed in 0.049 seconds,  using GeSHi 1.0.8.4

NeoLiu · by **NeoLiu** » Wed Jan 16, 2008 6:25 pm

Hi plusminus

i have another problem

i want Add an additional content view to the screen. Added after any existing ones in the screen -- existing views are NOT removed.

but my layout is not load from layout.xml, it was created myself

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 protected void onCreate(Bundle icicle) {
 
super.onCreate(icicle);
 
extras = getIntent().getExtras();
 
requestWindowFeature(Window.FEATURE_NO_TITLE);
 
mImagePSView = new ImagePSView(this, extras);
 
setContentView(mImagePSView);
 
//
 
} 
Parsed in 0.037 seconds,  using GeSHi 1.0.8.4

for example i want add a dialog about edit on the bitmap, look like MapActivity dialog edit
in this view add the contents any time i want or delete it

NeoLiu · by **NeoLiu** » Thu Jan 17, 2008 4:44 pm

The problem of save image file

The problem of save image file

Re: The problem of save image file

Re: The problem of save image file

Re: The problem of save image file

Re: The problem of save image file

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