我有一个LinearLayout
,里面装有FAB,FAB用作您单击的按钮,它使您可以选择图像作为组的图标(例如Telegram和WhatsApp),并且我有2个问题:
- 我想用用户选择的图像填充FAB(当然是通过编程方式)
-
LinearLayout
裁剪FAB阴影并使它看起来像素化。 我有一个问题,这甚至是正确的方法吗?使用FAB?我尝试使用CircleImageView,但是在设置默认图标时遇到问题... 非常感谢您的任何帮助:)
我尝试将其更改为CircleImageView,但是随后出现了设置选择照片的默认图标的问题,并且我知道圆形按钮应该是FAB。
而且我尝试将其更改为RelativeLayout
,但是发生了同样的问题...
XML:
<androidx.appcompat.widget.LinearLayoutCompat
android:id="@+id/photo_title_bar_linear_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="2dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="2dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<com.google.android.material.floatingactionbutton.FloatingactionButton
android:id="@+id/add_a_icon_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start|center_vertical"
android:backgroundTint="@color/add_image_background"
android:src="@drawable/ic_add_a_photo_blue"
app:borderWidth="0dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:tint="@null" />
<com.google.android.material.textfield.TextInputEditText
android:id="@+id/group_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginStart="10dp"
android:hint="Title"/>
</androidx.appcompat.widget.LinearLayoutCompat>
程序:
pickPhotoFAB.setOnClicklistener(new View.OnClicklistener() {
@Override
public void onClick(View v) {
if (ContextCompat.checkSelfPermission(AddEditGroupactivity.this,Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
//request the permission
activityCompat.requestPermissions(AddEditGroupactivity.this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},MY_PERMISSIONS_READ_EXTERNAL_STORAGE);
// MY_PERMISSIONS_REQUEST_READ_CONTactS is an
// app-defined int constant. The callback method gets the
// result of the request.
}
if ((ContextCompat.checkSelfPermission(AddEditGroupactivity.this,Manifest.permission.READ_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED)) {
Intent photoPick = new Intent(
Intent.actION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startactivityForResult(photoPick,PICK_IMAGE_REQUEST);
}
}
});
protected void onactivityResult(int requestCode,int resultCode,@Nullable Intent data) {
super.onactivityResult(requestCode,resultCode,data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case PICK_IMAGE_REQUEST:
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getcontentResolver().query(selectedImage,filePathColumn,null,null);
cursor.moveToFirst();
int columnIndex = cursor.getcolumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Bitmap pictureBM = BitmapFactory.decodeFile(picturePath);
pickPhotoFAB.setImageDrawable(new BitmapDrawable(getResources(),pictureBM));
break;
default:
Toast.makeText(getapplicationContext(),"Couldn't get photo",Toast.LENGTH_SHORT).show();
}
}
}
实际结果:
https://imgur.com/a/x5e6NzQ,
当我选择图像时,FAB保持不变。