[您好,由于Android编程中的新功能,我需要很大的帮助来解决此问题,然后我创建了一个图像应用,图像由我上传到Firebase Storage,因此我可以随时访问链接和令牌,因此,当用户选择要下载的图像时,现在我已经分割了我的应用程序,因此我创建了与图像一样多的片段,并且与图像相关的片段中包含了下载按钮,现在我向您展示如何>
import android.os.Bundle; import androidx.annotation.Nullable; import androidx.fragment.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; public class fragment_1 extends Fragment { Button bntDwn_1; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_1, container, false); } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); bntDwn_1 = (Button) getActivity().findViewById(R.id.dwn_1); bntDwn_1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //here I would like to insert the function to download the image directly } }); } }
现在向您展示片段的布局
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".fragment_1"> <ImageView android:id="@+id/sfondo_1" android:layout_width="0dp" android:layout_height="0dp" android:contentDescription="@string/sfondo_1" android:src="@drawable/forpaper_1" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="1.0" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.0" /> <Button android:id="@+id/dwn_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="4dp" android:text="@string/scarica" app:layout_constraintBottom_toBottomOf="@+id/sfondo_1" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="1.0" /> </androidx.constraintlayout.widget.ConstraintLayout>
现在向您展示MainActivity
import androidx.appcompat.app.AppCompatActivity; import androidx.fragment.app.FragmentManager; import androidx.fragment.app.FragmentTransaction; import android.content.SharedPreferences; import android.os.Bundle; import android.view.View; import android.widget.TextView; import com.google.firebase.storage.FirebaseStorage; import com.google.firebase.storage.StorageReference; import java.util.Random; public class MainActivity extends AppCompatActivity { private StorageReference mStorageRef; public Random mRandom; public TextView mCounterCrd; int StringCrd; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //Inizializzazione Archiviazione Cloud mStorageRef = FirebaseStorage.getInstance().getReference(); FragmentManager fm = getSupportFragmentManager(); FragmentTransaction tx = fm.beginTransaction(); fragment_1 fragmentview = new fragment_1(); tx.replace(R.id.frame_place, fragmentview); tx.commit(); } }
现在,我想问一个函数来下载已经知道链接的文件,然后在每个引用按钮的onClick函数下针对每个图像手动插入该文件,希望您可以提供许多有用的提示或必要的更改来帮助我,感谢所有人。
您好,因为Android编程中的新功能,所以我需要很大的帮助来解决此问题,然后我创建了一个图像应用程序,图像由我上传到Firebase Storage上,因此我可以访问...