我正在尝试使用Firebase存储和检索图像。当存储图像时,一切正常,但是我无法在ImageView中显示它。它没有给出错误,因此我无法理解错误在哪里。
public class MainActivity extends AppCompatActivity {
private Button btnSelectImage;
private ImageView mImageView;
private StorageReference mStorage;
private static final int CAMERA_REQUEST_CODE = 1 ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSelectImage = (Button) findViewById(R.id.btn_image);
mImageView = (ImageView) findViewById(R.id.imageView);
//Get instance
mStorage = FirebaseStorage.getInstance().getReference();
btnSelectImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_REQUEST_CODE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==CAMERA_REQUEST_CODE && resultCode==RESULT_OK){
Uri uri = data.getData();
StorageReference filePath = mStorage.child("CameraPhotos").child(uri.getLastPathSegment());
filePath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
//Show image
Uri downloadUri = taskSnapshot.getDownloadUrl();
Picasso.with(MainActivity.this).load(downloadUri).into(mImageView);
Toast.makeText(MainActivity.this,"Upload Done",Toast.LENGTH_SHORT).show();
Log.v("Test","image load");
}
});
}
}
}
也要授予权限。
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
这是我的 Firebase 存储规则。
service firebase.storage {
match /b/fir-app-ce89f.appspot.com/o {
match /{allPaths=**} {
allow read, write: if true;
}
}
}
这是我的活动布局。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.yusuf.firebaseapp.MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Select Image"
android:id="@+id/btn_image"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<ImageView
android:layout_width="400dp"
android:layout_height="350dp"
android:id="@+id/imageView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
ImageView
属性上。你能把它的XML贴出来吗? - Bob Snyder