触摸手势后,TouchImageView才会显示图像 [英] TouchImageView doesn't show image until after a pinch gesture
本文介绍了触摸手势后,TouchImageView才会显示图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在使用自定义视图 TouchImageView
.但是,当我设置位图时,除非在其上进行捏手势,否则它不会显示图像.
I'm using the custom view TouchImageView
. However, when I set the bitmap it doesn't show the image unless I do a pinch gesture on it.
public class PhotoOverlayActivity extends AppCompatActivity {
public static final String CURRENT_MESSAGE_KEY = "message";
private static final int IMAGE_REQUEST_CODE = 0;
String currentMessage;
private Bitmap bitmap;
private TouchImageView mImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo_overlay);
setupToolbar();
setupImageView();
currentMessage = getIntent().getStringExtra(CURRENT_MESSAGE_KEY);
chooseImage();
}
private void setupToolbar() {
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setTitle("");
}
}
private void setupImageView() {
mImageView = findViewById(R.id.imageView);
}
private void chooseImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, IMAGE_REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == IMAGE_REQUEST_CODE && resultCode == Activity.RESULT_OK)
try {
if (bitmap != null) {
bitmap.recycle();
}
InputStream stream = getContentResolver().openInputStream(data.getData());
bitmap = BitmapFactory.decodeStream(stream);
stream.close();
int nh = (int) (bitmap.getHeight() * (512.0 / bitmap.getWidth()));
Bitmap scaled = Bitmap.createScaledBitmap(bitmap, 512, nh, true);
mImageView.setImageBitmap(scaled);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
super.onActivityResult(requestCode, resultCode, data);
}
}
我终于在此处找到了解决方案,所以我在下面发布了我的答案
I finally found the solution buried here, so I am posting my answer below.
推荐答案
调用
mImageView.setImageBitmap(yourBitmap);
做
mImageView.setZoom(1f);
Another option would be to modify the source code to do the same thing since the TouchImageView
class is contained in your project anyway.
感谢这篇文章.
这篇关于触摸手势后,TouchImageView才会显示图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文