android通过文件管理器选择文件

    public void openSystemFile() {
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.setType("*/*");
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        try {
            startActivityForResult(Intent.createChooser(intent, "请选择文件!"),1);
        } catch (android.content.ActivityNotFoundException ex) {
            // Potentially direct the user to the Market with a Dialog
            Toast.makeText(this, "请安装文件管理器", Toast.LENGTH_SHORT).show();
        }
    }

选择完毕后会在onActivityResult(int requestCode, int resultCode, Intent data) 中获得文件的uri

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1 && resultCode == Activity.RESULT_OK) {
            // Get the Uri of the selected file
            Uri uri = data.getData();
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