java - 无法在 Android 中发送带有 PDF 文件作为附件的电子邮件

Question

我在 recyclerview 中显示我的文件，目标是能够在单击时将它们作为隐式意图通过电子邮件发送，因此用户不必通过从外部存储中提取它们来手动执行此操作。

但是，当我尝试执行此操作时，我的应用程序崩溃，没有错误消息。这是我获取文件路径并尝试发送它的主要活动，专门执行此操作的代码在 sendAsMail 和 OnItemClick 方法中

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class FileView extends AppCompatActivity {

    private RecyclerView fileRecyclerView;
    private RowAdapter fileAdapter;
    private RecyclerView.LayoutManager fileLayoutManager;
    private ArrayList<RowItem> rowItem;
    private List<File> fileList;
    private final String filePath = "PDF_files";
    private String fileData = "";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_file_view);
        File file = new File(getExternalFilesDir(filePath).toString());
        fileList = Arrays.asList(file.listFiles());
        createRows();
        buildRecyclerView();
    }

    public void createRows(){
        rowItem = new ArrayList<>();
        for (int i = 0; i < fileList.size(); i++) {
            rowItem.add(new RowItem(R.drawable.ic_book,(fileList.get(i).getName().replace("__", " ").replace('_','\n').replace('-','/').replace(".pdf",""))));
        }
    }

    public void removeItem(int position) {
        rowItem.remove(position);
        fileAdapter.notifyItemRemoved(position);
    }

    public void reListFiles(){
        File file = new File(getExternalFilesDir(filePath).toString());
        fileList = Arrays.asList(file.listFiles());
    }

    public void sendAsMail(String file) {

        Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
        shareIntent.setType("application/pdf");

        shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Sample Subject"); //set your subject
        shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Sample Text"); //set your message

        String filePath = file;
        File fileToShare = new File(filePath);
        Uri uri = Uri.fromFile(fileToShare);
        shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
        startActivity(Intent.createChooser(shareIntent, "Share File"));
    }


    public void buildRecyclerView() {

        fileRecyclerView = findViewById(R.id.recyclerView);
        fileRecyclerView.setHasFixedSize(true);
        fileLayoutManager = new LinearLayoutManager(this);
        fileAdapter = new RowAdapter(rowItem);
        fileRecyclerView.setLayoutManager(fileLayoutManager);
        fileRecyclerView.setAdapter(fileAdapter);

        fileAdapter.setOnItemClickListener(new RowAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                fileData = fileList.get(position).toString();
            //    Toast.makeText(FileView.this,"Clicked: " + fileData , Toast.LENGTH_SHORT).show();
                sendAsMail(fileData);
            }

            @Override
            public void onDeleteClick(int position) {
                removeItem(position);

                File deletePath = fileList.get(position);
                deletePath.delete();
                if(deletePath.exists()){
                    getApplicationContext().deleteFile(deletePath.getName());
                }
                reListFiles();
            }

            @Override
            public void onMenuClick(int position) {
            }
        });
    }
}

用建议的解决方案编辑

我的 sendAsMail 方法

   private void sendEmail(File attatchedFile, String name) {

        //File pdfFile = attatchedFile;
        File pdfFile = attatchedFile;
        Log.v("sendEmail STARTED: ","attatched file vaariable saved as File:  " + pdfFile);

        // Write data in your file
        Uri uri = FileProvider.getUriForFile(this, getPackageName(), pdfFile);

        Intent intent = ShareCompat.IntentBuilder.from(this)
                .setStream(uri) // uri from FileProvider
                .getIntent()
                .setAction(Intent.ACTION_VIEW) //Change if needed
                .setDataAndType(uri, "pdf/*")
                .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

        startActivity(intent);
    }

在onclick中调用方法

        fileAdapter.setOnItemClickListener(new RowAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                String name = fileList.get(position).getName();
                fileData = fileList.get(position);
                //Log.d("LOG: ","fileData: " + fileData + " name: " + name);
                sendEmail(fileData, name);
            }

我将以下变量传递给 sendEmail 方法

文件数据：/storage/emulated/0/Android/data/com.loopbreakr.firstpdf/files/PDF_files/file__name_2021-01-28_16:20:14.pdf

名称：文件__name_2021-01-28_16:20:14.pdf

编辑 - 我的登录崩溃

2021-01-28 17:08:11.904 19378-19378/com.loopbreakr.firstpdf V/STARTING METHOD W/:: fileData: /storage/emulated/0/Android/data/com.loopbreakr.firstpdf/files/PDF_files/file__name_2021-01-28_16:20:14.pdf name: file__name_2021-01-28_16:20:14.pdf
2021-01-28 17:08:11.904 19378-19378/com.loopbreakr.firstpdf V/sendEmail STARTED:: attatched file vaariable saved as File:  /storage/emulated/0/Android/data/com.loopbreakr.firstpdf/files/PDF_files/file__name_2021-01-28_16:20:14.pdf
2021-01-28 17:08:11.906 19378-19378/com.loopbreakr.firstpdf D/AndroidRuntime: Shutting down VM
2021-01-28 17:08:11.907 19378-19378/com.loopbreakr.firstpdf E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.loopbreakr.firstpdf, PID: 19378
    java.lang.IllegalArgumentException: Couldn't find meta-data for provider with authority com.loopbreakr.firstpdf
        at androidx.core.content.FileProvider.parsePathStrategy(FileProvider.java:606)
        at androidx.core.content.FileProvider.getPathStrategy(FileProvider.java:579)
        at androidx.core.content.FileProvider.getUriForFile(FileProvider.java:417)
        at com.loopbreakr.firstpdf.FileView.sendEmail(FileView.java:71)
        at com.loopbreakr.firstpdf.FileView.access$200(FileView.java:25)
        at com.loopbreakr.firstpdf.FileView$1.onItemClick(FileView.java:99)
        at com.loopbreakr.firstpdf.RowAdapter$RowViewHolder.lambda$new$0$RowAdapter$RowViewHolder(RowAdapter.java:51)
        at com.loopbreakr.firstpdf.-$$Lambda$RowAdapter$RowViewHolder$D8MO8iiQsge5Oqk6qgHk3jkm7ew.onClick(Unknown Source:4)
        at android.view.View.performClick(View.java:7448)
        at android.view.View.performClickInternal(View.java:7425)
        at android.view.View.access$3600(View.java:810)
        at android.view.View$PerformClick.run(View.java:28305)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

标签： javaandroidandroid-intentandroid-implicit-intent