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我将创建一个以一定数量的图像处理为核心功能的应用程序。我会想用它做以下事情-

  • 能够将下载或创建的图像保存在手机内存/存储卡中，这些图像也可能在图库中可用。
  • 对图像应用一些效果，例如调整大小、裁剪、旋转
  • 将拥有透明PNG形式的设计模板，它们可以相互叠加以创建效果或新设计（例如精美的相框等），并且在某个时间点，它们将是必需的在某个时间点被展平并保存为 PNG。

我正在寻找一些方法来很好地执行这些事情。

我已经看到，Android 可以帮助开发人员轻松实现业务逻辑，而无需让他们为 API 或小部件级别的细节而烦恼。

有什么可以满足我的要求吗？

请告诉我。谢谢！

4

1 回答 1

3 
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
thiz = this;
setContentView(R.layout.main);
mBtn = (Button) findViewById(R.id.btnLaunch);
photo = (ImageView) findViewById(R.id.imgPhoto);
mBtn.setOnClickListener(new OnClickListener(){

public void onClick(View v) {
try {
// Launch picker to choose photo for selected contact
Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
intent.setType("image/*");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", aspectX);
intent.putExtra("aspectY", aspectY);
intent.putExtra("outputX", outputX);
intent.putExtra("outputY", outputY);
intent.putExtra("scale", scale);
intent.putExtra("return-data", return_data);
intent.putExtra(MediaStore.EXTRA_OUTPUT, getTempUri());
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection",!faceDetection); // lol, negative boolean noFaceDetection
if (circleCrop) {
intent.putExtra("circleCrop", true);
}

startActivityForResult(intent, PHOTO_PICKED);
} catch (ActivityNotFoundException e) {
Toast.makeText(thiz, R.string.photoPickerNotFoundText, Toast.LENGTH_LONG).show();
}
}
});

}

private Uri getTempUri() {
return Uri.fromFile(getTempFile());
}

private File getTempFile() {
if (isSDCARDMounted()) {

File f = new File(Environment.getExternalStorageDirectory(),TEMP_PHOTO_FILE);
try {
f.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
Toast.makeText(thiz, R.string.fileIOIssue, Toast.LENGTH_LONG).show();
}
return f;
} else {
return null;
}
}

private boolean isSDCARDMounted(){
String status = Environment.getExternalStorageState();

if (status.equals(Environment.MEDIA_MOUNTED))
return true;
return false;
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);

switch (requestCode) {
case PHOTO_PICKED:
if (resultCode == RESULT_OK) {
if (data == null) {
Log.w(TAG, "Null data, but RESULT_OK, from image picker!");
Toast t = Toast.makeText(this, R.string.no_photo_picked,
Toast.LENGTH_SHORT);
t.show();
return;
}

final Bundle extras = data.getExtras();
if (extras != null) {
File tempFile = getTempFile();
// new logic to get the photo from a URI
if (data.getAction() != null) {
processPhotoUpdate(tempFile);
}
}
}
break;
}
}

它用于裁剪图像。或 http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android-apps/2.2_r1.1/com/android/camera/CropImage.java检查此链接

于 2010-12-07T17:53:54.240 回答