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SDカード「VCFFiles」内の特定のフォルダーからファイルを送信しようとしています。私はすべてのことを正しく行いました。もう一度機能しましたが、このアプリを実行すると、強制終了が表示されます。プロジェクトで行ったことは、ファイルが「VCFFiles」フォルダー内にリストされているため、5 つのラジオボタンとテキストを作成することです。ラジオボタンがクリックされると、送信ボタンをクリックすると編集テキストに入力された電子メールにそれぞれのvcfファイルが送信されます。以下は私のコードです:

public class SendActivity extends Activity{
    private static final int PICK_IMAGE = 1;
    EditText email;
    TextView add_manage;
    Button send;
    RadioGroup vcfgroup;
    RadioButton vcfButton;
    String filepath="";
    static File filevcf;
    static Context mContext;
    RadioButton vcf1;
    RadioButton vcf2;
    RadioButton vcf3;
    RadioButton vcf4;
    RadioButton vcf5;
    ProgressDialog dialog;
    String success;
    String message;
    String response;
    String data;
    File f;
    String radio;
    ArrayList<String> array;
//  String state = Environment.getExternalStorageState();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.send);


        email = (EditText)findViewById(R.id.emailid);
        send = (Button)findViewById(R.id.send);
        add_manage = (TextView)findViewById(R.id.add_manage);
        vcfgroup = (RadioGroup)findViewById(R.id.vcfgroup);
        vcf1 = (RadioButton)findViewById(R.id.vcf1);
        vcf2 = (RadioButton)findViewById(R.id.vcf2);
        vcf3 = (RadioButton)findViewById(R.id.vcf3);
        vcf4 = (RadioButton)findViewById(R.id.vcf4);
        vcf5 = (RadioButton)findViewById(R.id.vcf5);
        send = (Button)findViewById(R.id.send);
        // get selected radio button from radioGroup


        radio = vcf1.getText().toString();



        //get file names and set it in radio buttons
        if(!isExternalStorageAvailable() || isExternalStorageReadOnly()){

        }else{
        new EventListTask2().execute(this);
        }
        //send vcf files to the server
        send.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                int selectedId = vcfgroup.getCheckedRadioButtonId();

                vcf1 =(RadioButton)findViewById(selectedId);
                try{
                    f = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/VCFFiles/"+vcf1.getText().toString());
                    filepath = f.getPath();



                if(email.getText().length()!=0){
                    dialog = ProgressDialog.show(SendActivity.this,
                            "Sending", "Please wait...", true);
                    new EventListTask1().execute();
                }else{
                    Toast.makeText(getApplicationContext(), "You may have not entered emailid or selected wrong file!!", Toast.LENGTH_LONG).show();
                }
                }catch(Exception e){

                }
            }
        });

        add_manage.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent in = new Intent(SendActivity.this,AddContactActivity.class);
                startActivity(in);
            }
        });



    }




    public ArrayList<String> GetFiles() {
        ArrayList<String> MyFiles = new ArrayList<String>();
        File f = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/VCFFiles");

        f.mkdirs();
        File[] files = f.listFiles();
        if (files.length == 0)
            return null;
        else {
            for (int i=0; i<5; i++) 
                if(files[i].getPath().endsWith(".vcf")){
                MyFiles.add(files[i].getName());
                }
        }

        return MyFiles;
    }

EventListTask2 クラス内で、GetFiles() 関数を使用して「VCFFIles」からファイルをフェッチし、名前を各ラジオボタンの名前に関連付けています。内部のコードを以下に示します。

RadioButton radioset[] = {vcf1, vcf2, vcf3, vcf4, vcf5};
                if(GetFiles().size()!=0){
                array=GetFiles();
                for(int i=0;i<array.size();i++){
                    radioset[i].setText(array.get(i));
                }}else{
                    Toast.makeText(getApplicationContext(), "You have no vcf files saved", Toast.LENGTH_LONG).show();
                }

以下はアプリのログです。

03-18 18:41:17.410: E/AndroidRuntime(1598): FATAL EXCEPTION: main
03-18 18:41:17.410: E/AndroidRuntime(1598): java.lang.NullPointerException
03-18 18:41:17.410: E/AndroidRuntime(1598):     at com.example.mycontactdetails.SendActivity$EventListTask1.onPostExecute(SendActivity.java:321)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at com.example.mycontactdetails.SendActivity$EventListTask1.onPostExecute(SendActivity.java:1)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at android.os.AsyncTask.finish(AsyncTask.java:417)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at android.os.AsyncTask.access$300(AsyncTask.java:127)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at android.os.Looper.loop(Looper.java:123)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at android.app.ActivityThread.main(ActivityThread.java:4627)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at java.lang.reflect.Method.invokeNative(Native Method)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at java.lang.reflect.Method.invoke(Method.java:521)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-18 18:41:17.410: E/AndroidRuntime(1598):     at dalvik.system.NativeStart.main(Native Method)
03-18 18:53:12.560: E/IOException(1648): IO error: /mnt/sdcard/VCFFiles/Empty (Permission denied)
03-18 18:53:12.560: E/IOException(1648): java.io.FileNotFoundException: /mnt/sdcard/VCFFiles/Empty (Permission denied)
03-18 18:53:12.560: E/IOException(1648):    at org.apache.harmony.luni.platform.OSFileSystem.openImpl(Native Method)
03-18 18:53:12.560: E/IOException(1648):    at org.apache.harmony.luni.platform.OSFileSystem.open(OSFileSystem.java:152)
03-18 18:53:12.560: E/IOException(1648):    at java.io.FileInputStream.<init>(FileInputStream.java:82)
03-18 18:53:12.560: E/IOException(1648):    at com.example.mycontactdetails.SendActivity$Utils.PostDataToFavoriteUser(SendActivity.java:182)
03-18 18:53:12.560: E/IOException(1648):    at com.example.mycontactdetails.SendActivity$EventListTask1.doInBackground(SendActivity.java:310)
03-18 18:53:12.560: E/IOException(1648):    at com.example.mycontactdetails.SendActivity$EventListTask1.doInBackground(SendActivity.java:1)
03-18 18:53:12.560: E/IOException(1648):    at android.os.AsyncTask$2.call(AsyncTask.java:185)
03-18 18:53:12.560: E/IOException(1648):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
03-18 18:53:12.560: E/IOException(1648):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
03-18 18:53:12.560: E/IOException(1648):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
03-18 18:53:12.560: E/IOException(1648):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
03-18 18:53:12.560: E/IOException(1648):    at java.lang.Thread.run(Thread.java:1096)
03-18 18:53:12.630: E/AndroidRuntime(1648): FATAL EXCEPTION: main
03-18 18:53:12.630: E/AndroidRuntime(1648): java.lang.NullPointerException
03-18 18:53:12.630: E/AndroidRuntime(1648):     at com.example.mycontactdetails.SendActivity$EventListTask1.onPostExecute(SendActivity.java:321)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at com.example.mycontactdetails.SendActivity$EventListTask1.onPostExecute(SendActivity.java:1)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at android.os.AsyncTask.finish(AsyncTask.java:417)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at android.os.AsyncTask.access$300(AsyncTask.java:127)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at android.os.Looper.loop(Looper.java:123)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at android.app.ActivityThread.main(ActivityThread.java:4627)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at java.lang.reflect.Method.invokeNative(Native Method)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at java.lang.reflect.Method.invoke(Method.java:521)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-18 18:53:12.630: E/AndroidRuntime(1648):     at dalvik.system.NativeStart.main(Native Method)
03-18 19:00:13.010: E/IOException(1676): IO error: /mnt/sdcard/VCFFiles/Empty (Permission denied)
03-18 19:00:13.010: E/IOException(1676): java.io.FileNotFoundException: /mnt/sdcard/VCFFiles/Empty (Permission denied)
03-18 19:00:13.010: E/IOException(1676):    at org.apache.harmony.luni.platform.OSFileSystem.openImpl(Native Method)
03-18 19:00:13.010: E/IOException(1676):    at org.apache.harmony.luni.platform.OSFileSystem.open(OSFileSystem.java:152)
03-18 19:00:13.010: E/IOException(1676):    at java.io.FileInputStream.<init>(FileInputStream.java:82)
03-18 19:00:13.010: E/IOException(1676):    at com.example.mycontactdetails.SendActivity$Utils.PostDataToFavoriteUser(SendActivity.java:183)
03-18 19:00:13.010: E/IOException(1676):    at com.example.mycontactdetails.SendActivity$EventListTask1.doInBackground(SendActivity.java:311)
03-18 19:00:13.010: E/IOException(1676):    at com.example.mycontactdetails.SendActivity$EventListTask1.doInBackground(SendActivity.java:1)
03-18 19:00:13.010: E/IOException(1676):    at android.os.AsyncTask$2.call(AsyncTask.java:185)
03-18 19:00:13.010: E/IOException(1676):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
03-18 19:00:13.010: E/IOException(1676):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
03-18 19:00:13.010: E/IOException(1676):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
03-18 19:00:13.010: E/IOException(1676):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
03-18 19:00:13.010: E/IOException(1676):    at java.lang.Thread.run(Thread.java:1096)
03-18 19:00:13.090: E/AndroidRuntime(1676): FATAL EXCEPTION: main
03-18 19:00:13.090: E/AndroidRuntime(1676): java.lang.NullPointerException
03-18 19:00:13.090: E/AndroidRuntime(1676):     at com.example.mycontactdetails.SendActivity$EventListTask1.onPostExecute(SendActivity.java:322)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at com.example.mycontactdetails.SendActivity$EventListTask1.onPostExecute(SendActivity.java:1)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at android.os.AsyncTask.finish(AsyncTask.java:417)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at android.os.AsyncTask.access$300(AsyncTask.java:127)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at android.os.Looper.loop(Looper.java:123)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at android.app.ActivityThread.main(ActivityThread.java:4627)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at java.lang.reflect.Method.invokeNative(Native Method)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at java.lang.reflect.Method.invoke(Method.java:521)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-18 19:00:13.090: E/AndroidRuntime(1676):     at dalvik.system.NativeStart.main(Native Method)

何が問題なのかわかりませんか?どんな助けでも感謝します。

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