我正在开发一个Android应用程序,希望用户从图库中选择图像。但是我已经看到API 29不推荐使用getBitmap
我尝试过ImageDecoder.decodeBitmap(Imagedecoder.createSource())
,但它使应用程序崩溃
if (requestCode == GALLERY){
if (data != null) {
Uri contentURI = data.getData();
try {
if (contentURI!=null){
bitmap = ImageDecoder.decodeBitmap(ImageDecoder.createSource(getContentResolver(), contentURI));
Toast.makeText(getApplicationContext(), "Image Saved!", Toast.LENGTH_SHORT).show();
pic.setImageBitmap(bitmap);
}
dialog.show();
} catch (Exception e){
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Failed!", Toast.LENGTH_SHORT).show();
}
}
}
我不明白为什么应用程序崩溃了。
这是崩溃日志
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/graphics/ImageDecoder;
at com.example.myapplication.ProfileView.onActivityResult(ProfileView.java:313)
at android.app.Activity.dispatchActivityResult(Activity.java:6223)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3632)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3679)
at android.app.ActivityThread.access$1300(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1358)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5354)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.graphics.ImageDecoder" on path: DexPathList[[zip file "/data/app/com.example.myapplication-1/base.apk", zip file "/data/app/com.example.myapplication-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.myapplication-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.example.myapplication.ProfileView.onActivityResult(ProfileView.java:313)
at android.app.Activity.dispatchActivityResult(Activity.java:6223)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3632)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3679)
at android.app.ActivityThread.access$1300(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1358)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5354)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
Suppressed: java.lang.ClassNotFoundException: android.graphics.ImageDecoder
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 14 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
最佳答案
从public static Bitmap getBitmap (ContentResolver cr, Uri url)的文档
示例算法可以是
if (android.os.Build.VERSION.SDK_INT >= 29){
// To handle deprication use
ImageDecoder.decodeBitmap(Imagedecoder.createSource())
} else{
// Use older version
MediaStore.Images.Media.getBitmap(contentResolver, imageUri)
}