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android - 合并两个图像并保存到 sd 卡

转载 作者:行者123 更新时间:2023-11-29 18:15:06 25 4
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我有组合两个 image 并在 canvas 中一起显示它们的代码,如下所示。你能说说如何将其存储单个图像吗。

public class ChoosePictureComposite extends Activity implements OnClickListener {

static final int PICKED_ONE = 0;
static final int PICKED_TWO = 1;

boolean onePicked = false;
boolean twoPicked = false;

Button choosePicture1, choosePicture2;
ImageView compositeImageView;

Bitmap bmp1, bmp2;
Canvas canvas;
Paint paint;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

compositeImageView = (ImageView) this
.findViewById(R.id.CompositeImageView);

choosePicture1 = (Button) this.findViewById(R.id.ChoosePictureButton1);
choosePicture2 = (Button) this.findViewById(R.id.ChoosePictureButton2);

choosePicture1.setOnClickListener(this);
choosePicture2.setOnClickListener(this);
}

public void onClick(View v) {

int which = -1;

if (v == choosePicture1) {
which = PICKED_ONE;
} else if (v == choosePicture2) {
which = PICKED_TWO;
}

Intent choosePictureIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(choosePictureIntent, which);
}

protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);

if (resultCode == RESULT_OK) {
Uri imageFileUri = intent.getData();

if (requestCode == PICKED_ONE) {
bmp1 = loadBitmap(imageFileUri);
onePicked = true;
} else if (requestCode == PICKED_TWO) {
bmp2 = loadBitmap(imageFileUri);
twoPicked = true;
}

if (onePicked && twoPicked) {
Bitmap drawingBitmap = Bitmap.createBitmap(bmp1.getWidth(),
bmp1.getHeight(), bmp1.getConfig());
canvas = new Canvas(drawingBitmap);
paint = new Paint();
canvas.drawBitmap(bmp1, 90, 0, paint);
// paint.setXfermode(new PorterDuffXfermode(
// android.graphics.PorterDuff.Mode.MULTIPLY));
canvas.drawBitmap(bmp2, 30, 40, paint);


compositeImageView.setImageBitmap(drawingBitmap);
}
}
}

private Bitmap loadBitmap(Uri imageFileUri) {
Display currentDisplay = getWindowManager().getDefaultDisplay();

float dw = currentDisplay.getWidth();
float dh = currentDisplay.getHeight();

Bitmap returnBmp = Bitmap.createBitmap((int) dw, (int) dh,
Bitmap.Config.ARGB_4444);

try {
// Load up the image's dimensions not the image itself
BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
bmpFactoryOptions.inJustDecodeBounds = true;
returnBmp = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(imageFileUri), null, bmpFactoryOptions);

int heightRatio = (int) Math.ceil(bmpFactoryOptions.outHeight / dh);
int widthRatio = (int) Math.ceil(bmpFactoryOptions.outWidth / dw);

Log.v("HEIGHTRATIO", "" + heightRatio);
Log.v("WIDTHRATIO", "" + widthRatio);

// If both of the ratios are greater than 1, one of the sides of the
// image is greater than the screen
if (heightRatio > 1 && widthRatio > 1) {
if (heightRatio > widthRatio) {
// Height ratio is larger, scale according to it
bmpFactoryOptions.inSampleSize = heightRatio;
} else {
// Width ratio is larger, scale according to it
bmpFactoryOptions.inSampleSize = widthRatio;
}
}

// Decode it for real
bmpFactoryOptions.inJustDecodeBounds = false;
returnBmp = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(imageFileUri), null, bmpFactoryOptions);
} catch (FileNotFoundException e) {
Log.v("ERROR", e.toString());
}

return returnBmp;
}
}

最佳答案

试试这个:

public class Aura extends Activity {
protected static final String TAG = Aura.class.getName();
private static String mTempDir;
Bitmap mBackImage, mTopImage, mBackground, mInnerImage, mNewSaving;
Canvas mComboImage;
FileOutputStream mFileOutputStream;
BitmapDrawable mBitmapDrawable;
private String mCurrent = null;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.aura);

mTempDir = Environment.getExternalStorageDirectory() + "/" + "Aura" + "/";
mCurrent = "Aura.png";
prepareDirectory();

mBackground = Bitmap.createBitmap(604, 1024, Bitmap.Config.ARGB_8888);
mBackImage = BitmapFactory.decodeResource(getResources(), R.drawable.aura);
mTopImage = BitmapFactory.decodeResource(getResources(), R.drawable.test);
mInnerImage = BitmapFactory.decodeResource(getResources(), R.drawable.anothertest);

mComboImage = new Canvas(mBackground);
mComboImage.drawBitmap(mBackImage, 0f, 0f, null);
mComboImage.drawBitmap(mTopImage, 0f, 0f, null);
mComboImage.drawBitmap(mInnerImage, 0f, 0f, null);
mFileOutputStream = null;

mSave.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.v(TAG, "Save Tab Clicked");
try {
mBitmapDrawable = new BitmapDrawable(mBackground);
mNewSaving = ((BitmapDrawable) mBitmapDrawable).getBitmap();
String FtoSave = mTempDir + mCurrent;
File mFile = new File(FtoSave);
mFileOutputStream = new FileOutputStream(mFile);
mNewSaving.compress(CompressFormat.PNG, 95, mFileOutputStream);
mFileOutputStream.flush();
mFileOutputStream.close();
} catch (FileNotFoundException e) {
Log.v(TAG, "FileNotFoundExceptionError " + e.toString());
} catch (IOException e) {
Log.v(TAG, "IOExceptionError " + e.toString());
}
}
});
}//onCreate

private boolean prepareDirectory() {
try {
if (makeDirectory()) {
return true;
} else {
return false;
}
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, getString(R.string.sdcard_error), 1000).show();
return false;
}
}

private boolean makeDirectory() {
File mTempFile = new File(mTempDir);
if (!mTempFile.exists()) {
mTempFile.mkdirs();
}

if (mTempFile.isDirectory()) {
File[] mFiles = mTempFile.listFiles();
for (File mEveryFile : mFiles) {
if (!mEveryFile.delete()) {
System.out.println(getString(R.string.failed_to_delete) + mEveryFile);
}
}
}
return (mTempFile.isDirectory());
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((!(android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.DONUT)
&& keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0)) {
onBackPressed();
}
return super.onKeyDown(keyCode, event);
}

public void onBackPressed() {
finish();
}
}

关于android - 合并两个图像并保存到 sd 卡,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8611625/

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