我知道这个问题已经在这里被问到并回答了，但由于某些原因，如果解决方案对我不起作用。
所以这就是我试图这样做的方式。我的布局中有两个按钮，一个用于打开图库，另一个用于上传图像。
定义的成员
int SELECT_PICTURES = 1;
ArrayList<Uri> mArrayUri = new ArrayList<Uri>();
Uri imageUri;
int up = 0;
int k =0;
图库按钮代码
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURES);
关于活动结果代码
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == SELECT_PICTURES) {
if (resultCode == MainActivity.RESULT_OK) {
if (data.getClipData() != null) {
int count = data.getClipData().getItemCount();
Log.i("count", String.valueOf(count));
int currentItem = 0;
while (currentItem < count) {
imageUri = data.getClipData().getItemAt(currentItem).getUri();
Log.i("uri", imageUri.toString());
mArrayUri.add(imageUri);
currentItem = currentItem + 1;
}
Log.i("listsize", String.valueOf(mArrayUri.size()));
} else if (data.getData() != null) {
String imagePath = data.getData().getPath();
}
}
}
}
上传按钮代码
StorageReference filepath = FirebaseStorage.getInstance().getReference().child("gpic");
while (up < mArrayUri.size()){
// error is pointing to this line, line 82
filepath.child(mArrayUri.get(k).getLastPathSegment()).putFile(mArrayUri.get(k)).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadURL = taskSnapshot.getDownloadUrl();
Toast.makeText(TestingActivity.this, downloadURL.toString(), Toast.LENGTH_SHORT).show();
up++;
k++;
}
});
}
}
以上代码上传了一张图片，然后崩溃并出现以下错误
01-24 12:37:37.416 8336-8336/com.codenemesis.uploading E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.codenemesis.uploading, PID: 8336
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22265)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22265)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: java.util.concurrent.RejectedExecutionException: Task com.google.firebase.storage.zzs@c59b7fe rejected from java.util.concurrent.ThreadPoolExecutor@4b6eb5f[Running, pool size = 2, active threads = 2, queued tasks = 128, completed tasks = 0]
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2049)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:814)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1360)
at com.google.firebase.storage.zzu.zzt(Unknown Source)
at com.google.firebase.storage.UploadTask.schedule(Unknown Source)
at com.google.firebase.storage.StorageTask.zzcls(Unknown Source)
at com.google.firebase.storage.StorageReference.putFile(Unknown Source)
at **com.codenemesis.uploading.TestingActivity.up(TestingActivity.java:82)**
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22265)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
答案 0 :(得分：0)
找到导致问题的原因。我正在增加变量＆＃34; up＆＃34;和＆＃34; k＆＃34;在onSuccessListener内。这可能会在上传URI之前改变它们的值，所以我将它们递增到onSuccessListener之外，它完全正常。
上传按钮代码
StorageReference filepath = FirebaseStorage.getInstance().getReference().child("gpic");
while (up < mArrayUri.size()){
filepath.child(mArrayUri.get(k).getLastPathSegment()).putFile(mArrayUri.get(k)).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadURL = taskSnapshot.getDownloadUrl();
Toast.makeText(TestingActivity.this, downloadURL.toString(), Toast.LENGTH_SHORT).show();
}
});
up++;
k++;
}
}
答案 1 :(得分：0)
完全期货是解决这个问题的更好方法。
下面的上传方法返回一个完整的未来。
fun uploadImage(
path: String, imageUrl: Uri): CompletableFuture<String> {
val productImagesRef = storage.reference.child("$path/${imageUrl.lastPathSegment}")
val uploadTask = productImagesRef.putFile(imageUrl)
val promise = CompletableFuture<String>()
uploadTask.addOnFailureListener {
promise.completeExceptionally(it)
}.addOnSuccessListener {
productImagesRef.downloadUrl.addOnSuccessListener {
promise.complete(it.toString())
}.addOnFailureListener {
promise.completeExceptionally(it)
}
}
return promise
}
调用者可以等待多个上传完成的期货，如下所示。此外，在 android 中，调用者为多次上传生成一个新线程而不阻塞 UI 主线程是理想的。
Thread {
val imageUploadPromises = imageUris.map {
uploadImage(product.group, product.type, product.name, it)
}
// wait for all uploads to finish. join() makes it wait.
CompletableFuture.allOf(*imageUploadPromises.toTypedArray()).join()
//To get individual downloadUrls
val downloadUrls = imageUploadPromises.map { it.get() }
}.start()