我已经四处寻找解决下面我遇到的问题的方法,并且没有找到任何东西。 在应用程序中,我有一个带有预定义drawable的ImageButton。我的用户是能够点击这个ImageButton,从Phone的图像库中选择一张图片并显示该图片,直到用户再次更改它为止。 到目前为止,我设法让ImageGallery显示并能够选择一张图片,但我无法执行以下操作:
1. Show the Picture from the Picture Gallery in the shape of the original drawable -- it is a circle
2. When I change activity and come back to this activity, the picture chosen is not there anymore.
我的代码如下所示: ImageButton的XML在LinearLayout
中 <ImageButton
android:id="@+id/AddPic"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.4"
android:background="#00FFFFFF"
android:contentDescription="@string/MyInformation"
android:gravity="left"
android:onClick="AddPic"
android:src="@drawable/dp_holder_large"
/>
我的Java代码如下所示:
public class MyInformation extends Activity{
ImageButton imgButton;
public static int RESULT_LOAD_IMAGE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.myinformation);
//Adding the picture bit
imgButton = (ImageButton) findViewById(R.id.AddPic);
imgButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent GaleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(GaleryIntent, RESULT_LOAD_IMAGE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri SelectedImage = data.getData();
String[] FilePathColumn = {MediaStore.Images.Media.DATA };
Cursor SelectedCursor = getContentResolver().query(SelectedImage, FilePathColumn, null, null, null);
SelectedCursor.moveToFirst();
int columnIndex = SelectedCursor.getColumnIndex(FilePathColumn[0]);
String picturePath = SelectedCursor.getString(columnIndex);
SelectedCursor.close();
// Drawable d = new BitmapDrawable(getResources(),BitmapFactory.decodeFile(picturePath));
// btnOpenGalery .setImageBitmap(d);
imgButton.setImageBitmap(BitmapFactory.decodeFile(picturePath));
Toast.makeText(getApplicationContext(), picturePath, Toast.LENGTH_SHORT).show();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
谢谢!
答案 0 :(得分:0)
问题1的解决方案:
删除背景并使用圆圈制作自定义背景。
不要使用android:src="@drawable/dp_holder_large"
因为一旦你将图像设置为它,那么圆圈就会消失
问题2的解决方案:
您需要使用startActivityForResult()
方法
Intent newIntent = new Intent(CurrentActivity.this, NextActivity.class);
startActivityForResult(newIntent, 2);
在您的onActivityResult()
方法中
if(resultCode==2){
imgButton.setImageBitmap(BitmapFactory.decodeFile(picturePath));//where picturePath is the path
}