Android工具之启动文件选择器

public class MainActivity extends AppCompatActivity {

    private Button mBtnFileInput;
    private static final int FILE_SELECT_CODEB = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnFileInput = findViewById(R.id.btn_input);
        mBtnFileInput.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
                intent.setType("*/*");//设置类型
                intent.addCategory(Intent.CATEGORY_OPENABLE);
                try {
                    startActivityForResult(Intent.createChooser(intent, "选择文件"),
                            FILE_SELECT_CODEB);
                } catch (android.content.ActivityNotFoundException ex) {
                    LogUtils.v("没有找到想要的文件");
                }
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == 1) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                    //高于API19版本
                    String[] split = data.getData().getPath().split("\\:");
                    String p = "";
                    if (split.length >= 2) {
                        p = Environment.getExternalStorageDirectory() + "/" + split[1];
                        LogUtils.v(p);
                        boolean mainthread = Looper.getMainLooper() == Looper.myLooper();
                        LogUtils.v(mainthread + "");
                        new ReadFileTask().execute(p);
                    }
                } else {
                    //低于API19版本
                    Uri uri = data.getData();
                    LogUtils.v("文件路径" + uri.getPath());
                }
            }
        }
    }
}

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