【安卓学习之常见问题】文件分享--文件不存在

█ 【安卓学习之常见问题】文件分享–文件不存在

█ 系列文章目录

提示：这里是收集了和文件分享有关的文章

• 【安卓学习之常见问题】android路径及文件问题
• 【安卓学习之常见问题】文件分享–文件不存在

█ 文章目录

█ 读前说明

• 本文通过学习别人写demo,学习一些课件,参考一些博客,’学习相关知识，如果涉及侵权请告知
• 本文只简单罗列相关的代码实现过程
• 涉及到的逻辑以及说明也只是简单介绍，主要当做笔记，了解过程而已　　　　
  

█ 问题

• 文件不存在
  

• 之前都可以正常发送

█ 使用过程

• 文件路径的传输过程（数据有点出入，因为刚开始测试是这样，后面测试又没有这个问题）

• 代码实现：

		File shareFile = new File(mDirName, mFileName);// /storage/emulated/0/Android/data/com.bx.share/files/
        Uri uri;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            // content://com.bx.share.fileprovider/external_files/Android/data/com.bx.share/files/share/xxx.mp3
            uri = FileProvider.getUriForFile(this, getPackageName() + ".fileprovider", shareFile);
        } else {
            uri = Uri.fromFile(shareFile);
        }
        Intent intent = getChooserIntent(uri);
        
        Intent pickIntent = new Intent();
        pickIntent.setAction(Intent.ACTION_PICK_ACTIVITY);
        pickIntent.putExtra(Intent.EXTRA_TITLE, "4.分享文件 Pick Activity");
        pickIntent.putExtra(Intent.EXTRA_INTENT, intent);
        startActivityForResult(pickIntent, RESULT_SHARE);

    public Intent getChooserIntent(Uri uri) {
        Intent intent = new Intent(Intent.ACTION_SEND);// 共享文件，部分app需要手机联网
        intent.addCategory(Intent.CATEGORY_DEFAULT);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);// 传递权限
        intent.putExtra(Intent.EXTRA_TEXT, "分享测试123");
        intent.putExtra(Intent.EXTRA_STREAM, uri);
        intent.setType("application/*");// 二进制文件 "application/octet-stream" "*/*"
        return intent;
    }

█ 正常使用

• 代码：

public class SupportYesNoDialog extends DialogFragment {

    protected final static String EXTRA_DIALOG_TAG = "extra_dialog_tag";
    protected final static String EXTRA_TITLE = "title";
    protected final static String EXTRA_MESSAGE = "message";
    protected final static String EXTRA_POSITIVE_LABEL = "positive_label";
    protected final static String EXTRA_NEGATIVE_LABEL = "negative_label";
    protected Listener mListener;
    
    public interface Listener {
        void onDialogYes(String dialogTag);

        void onDialogNo(String dialogTag);
    }

    public static SupportYesNoDialog newInstance(Context context, String dialogTag, String title, String msg) {
        if (dialogTag == null)
            throw new IllegalArgumentException("The dialog tag must not be null!");

        SupportYesNoDialog f = new SupportYesNoDialog();

        Bundle b = new Bundle();
        b.putString(EXTRA_DIALOG_TAG, dialogTag);
        b.putString(EXTRA_TITLE, title);
        b.putString(EXTRA_MESSAGE, msg);
        b.putString(EXTRA_POSITIVE_LABEL, context.getString(android.R.string.yes));
        b.putString(EXTRA_NEGATIVE_LABEL, context.getString(android.R.string.no));

        f.setArguments(b);
        return f;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return buildDialog(savedInstanceState).create();
    }

    protected AlertDialog.Builder buildDialog(Bundle savedInstanceState){
        final Bundle arguments = getArguments();

        final String dialogTag = arguments.getString(EXTRA_DIALOG_TAG);

        AlertDialog.Builder b = new AlertDialog.Builder(getActivity())
                .setTitle(arguments.getString(EXTRA_TITLE))
                .setView(generateContentView(savedInstanceState))
                .setPositiveButton(arguments.getString(EXTRA_POSITIVE_LABEL), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        if (mListener != null)
                            mListener.onDialogYes(dialogTag);
                    }
                })
                .setNegativeButton(arguments.getString(EXTRA_NEGATIVE_LABEL), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        if (mListener != null)
                            mListener.onDialogNo(dialogTag);
                    }
                });

        return b;
    }

    public boolean isShown() {
        return getDialog() != null && getDialog().isShowing();
    }

    @Override
    public void show(@NonNull FragmentManager manager, @Nullable String tag) {
        if (isShown()) {
            return;
        }
        if (isAdded() && getDialog() != null) {
            getDialog().show();
            return;
        }
        super.show(manager, tag);
    }

}

• 偶尔会出现：IllegalStateException

    private SupportYesNoDialog dialog;

    private void getConfirmation(String title, String msg) {
        if (dialog== null) {
            dialog = mSupportYesNoDialog.newInstance(this, "fragment_Tag", title, msg);
        }
        dialog.show(getSupportFragmentManager(), "fragment_Tag");
    }

#236002 java.lang.IllegalStateException
Fragment already added: SupportYesNoDialog{865d6b8} (8f2fb666-b09e-47cf-a60f-9fde9f9559b6) fragment_Tag}
androidx.fragment.app.FragmentStore.addFragment(FragmentStore.java:67)

█ IllegalStateException:Fragment already added

• 修改后会发现，调用两次才会弹框一次，
• 实际上，虽然我点击了外部，弹框消失，但是没有执行 onDismiss()，等下次 show（）的时候

    private SupportYesNoDialog dialog;

    private void getConfirmation(String title, String msg) {
        if (dialog== null) {
            dialog= mSupportYesNoDialog.newInstance(this, "fragment_Tag", title, msg);
        }
        if (dialog.isAdded()) {
            getSupportFragmentManager().beginTransaction().remove(dialog).commit();
        }
        dialog.show(getSupportFragmentManager(), "fragment_Tag");
    }

• 修改后正常

    private SupportYesNoDialog dialog;

    private void getConfirmation(String title, String msg) {
        if (dialog!= null) {
           try {
                //在每个add事务前增加一个remove事务，防止连续的add
                manager.beginTransaction().remove(dialog).commit();
            } catch (Exception e) {
                //同一实例使用不同的tag会异常，这里捕获一下
                e.printStackTrace();
            }
        }
        dialog = mSupportYesNoDialog.newInstance(this, "fragment_Tag", title, msg);
        dialog.show(getSupportFragmentManager(), "fragment_Tag");
    }

█ 其他

█ 相关资料

提示：这里是参考的相关文章

1. Android SVG to VectorDrawable >>>>svg转Vector
2. 2016-12-23 Android Vector详解_yw1688的专栏-CSDN博客_android vector

█ 免责声明

转载请注明出处：
https://blog.csdn.net/ljb568838953/article/details/110383353