Question

我一直试图制作一款使用手机内存储存的应用。这就是我的方法：

public void writeToFile(String data,String name, Context context) {
    try {
        FileOutputStream fos = openFileOutput(name, Context.MODE_PRIVATE);
        fos.write(data.getBytes());
        fos.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

当我尝试使用writeToFile方法时，应用程序崩溃。

[编辑]

我对你来说有点新意，这就是你的意思吗？

    08-20 17:32:04.301 921-921/com.adamcomp.websitecreator E/AndroidRuntime: FATAL EXCEPTION: main
                                                                     Process: com.adamcomp.websitecreator, PID: 921
                                                                     java.lang.IllegalArgumentException: File android.support.v7.widget.AppCompatEditText{5211a9d VFED..CL. .F...... 150,514-570,605 #7f0d007c app:id/prjname}_code.txt contains a path separator
                                                                         at android.app.ContextImpl.makeFilename(ContextImpl.java:2322)
                                                                         at android.app.ContextImpl.openFileOutput(ContextImpl.java:466)
                                                                         at android.content.ContextWrapper.openFileOutput(ContextWrapper.java:197)
                                                                         at com.adamcomp.websitecreator.NewProject.writeToFile(NewProject.java:75)
                                                                         at com.adamcomp.websitecreator.NewProject$1.onClick(NewProject.java:60)
                                                                         at android.view.View.performClick(View.java:5721)
                                                                         at android.widget.TextView.performClick(TextView.java:10949)
                                                                         at android.view.View$PerformClick.run(View.java:22624)
                                                                         at android.os.Handler.handleCallback(Handler.java:739)
                                                                         at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                         at android.os.Looper.loop(Looper.java:148)
                                                                         at android.app.ActivityThread.main(ActivityThread.java:7407)
                                                                         at java.lang.reflect.Method.invoke(Native Method)
                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Answer 1

java.lang.IllegalArgumentException: File android.support.v7.widget.AppCompatEditText{5211a9d VFED..CL. .F...... 150,514-570,605 #7f0d007c app:id/prjname}_code.txt contains a path separator

您似乎正在传递toString() EditText作为文件名，此字符串表示包含无效字符。

相反，要在EditText中获取文字内容，请致电getText()以获取Editable并在其上调用toString()。所以，如果你现在有

editText.toString()

将其更改为

editText.getText().toString()

Answer 2

如果您尝试将文件保存在数据目录中，请尝试此操作：

public void save(String data, String folder, String fileName, Context c) {
    File Folder = new File(c.getFilesDir() + File.separator + folder);
    if (!Folder.mkdir()) {

    }
    //Make sure not to include a path separator("/")
    //Just enter the path name.
    //e.g If you want to store the file in a folder named myFolder, and you file name is myFile
    //Then use the function like this: save(your data,"myFolder","myFile",context);

    File file = new File(c.getFilesDir() + File.separator
            + folder + File.separator + fileName);


    try {
        if (!file.createNewFile()) {
        }

        OutputStream osw = new FileOutputStream(file, true);

        osw.write(data.getBytes());

    } catch (IOException e) {
        e.printStackTrace();
    }
}

Answer 3

也许你有问题，

 } catch (IOException ex) {
    ex.printStackTrace();
    return null;
}

您正在使用Exception尝试使用IOException

尝试写入内部存储中的文件时，应用程序崩溃 - Android Studio

3 个答案: