1. 简单使用

• 继承DialogFragment

/** * 显示系统的对话框Fragment * @author mazaiting * @date 2018/3/1 */public class CustomDialogFragment extends DialogFragment implements DialogInterface.OnClickListener{    private static final String TAG = "CustomDialogFragment";    @NonNull    @Override    public Dialog onCreateDialog(Bundle savedInstanceState) {        AlertDialog.Builder builder =                new AlertDialog.Builder(getActivity())                .setTitle("标题")                .setMessage("消息")                .setPositiveButton("确定", this)                .setNegativeButton("取消", this)                .setCancelable(false);        // 这里不能调用show方法        return builder.create();    }    @Override    public void onClick(DialogInterface dialog, int which) {        switch (which) {            case DialogInterface.BUTTON_NEGATIVE:                Toast.makeText(getActivity(), "取消", Toast.LENGTH_SHORT).show();                break;            case DialogInterface.BUTTON_POSITIVE:                Toast.makeText(getActivity(), "确定", Toast.LENGTH_SHORT).show();                break;            default:                break;        }    }}

• 使用

new CustomDialogFragment().show(getSupportFragmentManager(), "custom");

2. 自定义View的DialogFragment

• 继承Fragment

public class ViewDialogFragment extends DialogFragment {    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);        return inflater.inflate(R.layout.dialog, container, false);    }}

• 布局dialog.xml

• 使用

new ViewDialogFragment().show(getSupportFragmentManager(), "view");

3. 接口通信

• 接口

/** * 接口通信 * @author mazaiting * @date 2018/3/1 */public interface DataCallback {    /**     * 获取数据     * @param data 数据     */    void getData(String data);}

• 继承DialogFragment

/** * 接口通信 * * @author mazaiting * @date 2018/3/1 */public class DataDialogFragment extends DialogFragment implements DialogInterface.OnClickListener {    @NonNull    @Override    public Dialog onCreateDialog(Bundle savedInstanceState) {        AlertDialog.Builder builder =                new AlertDialog.Builder(getActivity())                        .setTitle("标题")                        .setMessage("消息")                        .setPositiveButton("确定", this)                        .setNegativeButton("取消", this)                        .setCancelable(false);        return builder.create();    }    @Override    public void onClick(DialogInterface dialog, int which) {        DataCallback callback = (DataCallback) getActivity();        switch (which) {            case DialogInterface.BUTTON_NEGATIVE:                callback.getData("取消");                break;            case DialogInterface.BUTTON_POSITIVE:                callback.getData("确定");                break;            default:                break;        }    }}

• 使用

public class MainActivity extends AppCompatActivity implements DataCallback{    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ButterKnife.inject(this);    }    @OnClick({R.id.btn_custom, R.id.btn_view, R.id.btn_get_data})    public void onViewClicked(View view) {        switch (view.getId()) {            case R.id.btn_custom:                new CustomDialogFragment().show(getSupportFragmentManager(), "custom");                break;            case R.id.btn_view:                new ViewDialogFragment().show(getSupportFragmentManager(), "view");                break;            case R.id.btn_get_data:                new DataDialogFragment().show(getSupportFragmentManager(), "data");                break;            default:                break;        }    }    @Override    public void getData(String data) {        Toast.makeText(this, data, Toast.LENGTH_SHORT).show();    }}