Android仿Ios实现Dialog圆角弹窗

转载请标明出处：https://blog.csdn.net/m0_38074457/article/details/84979890 ，本文出自：【陈少华的博客】

一、先看效果

https://github.com/hnsycsxhzcsh/IosDialog/blob/master/img/18tkr-gc4gb.gif

实现原理：

1.使用控件DialogFragment,在初始化的时候设置背景为透明，无头部

2.xml大布局是一个四角椭圆

3.底部左侧是一个左下角椭圆，底部右侧是一个右下角椭圆

二、实现大布局layout_dialog_ensure.xml

大布局的背景是dialog_fragment_circle_background.xml，是一个椭圆背景

底部布局是dialog_ensure_bottom.xml

底部左侧背景是dialog_fragment_ensure_cancel_selector.xml，放在drawable包下

dialog_fragment_circle_background_ensure_cancel_selected.xml为选中状态，放在drawable包下

dialog_fragment_circle_background_ensure_cancel.xml为正常状态，放在drawable包下

同理底部右侧，按照底部左侧来实现

三、创建基类BaseDialogFragment对象，EnsureDialog继承此基类

初始化的时候一定要设置 对话框内部背景设置透明，和无标题
getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);

public abstract class BaseDialogFragment extends DialogFragment {
    protected static final int SIZE_DEFAULT = -1;
    protected static final int SIZE_LOADING = 1;

    protected static final float COLOR_DEFAULT = 1.0f;
    protected static final float COLOR_TRANSPARENT = 0.0f;

    private int size = -1;
    private float color = 1.0f;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(getLayoutId(), container, false);
        init(view);
        initDialog();
        return view;
    }

    public abstract int getLayoutId();

    protected abstract void init(View view);

    private void initDialog() {
        //对话框内部背景设置透明
        getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
    }

    @Override
    public void onStart() {
        super.onStart();

        if (color != COLOR_DEFAULT) {
            //如果过不是默认颜色，就设置指定color背景颜色
            Window window = getDialog().getWindow();
            WindowManager.LayoutParams windowParams = window.getAttributes();
            windowParams.dimAmount = color;

            window.setAttributes(windowParams);
        }
    }

    protected void initWindowSize(int size) {
        this.size = size;
        initWindowSize();
    }

    protected void initWindowSize() {
        Dialog dialog = getDialog();
        if (dialog != null) {
            DisplayMetrics dm = new DisplayMetrics();
            getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
            if (size == SIZE_LOADING) {
//                dialog.getWindow().setLayout((int) (dm.widthPixels * 0.5), (int) (dm.widthPixels * 0.5));
                dialog.getWindow().setLayout(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            } else {
                dialog.getWindow().setLayout((int) (dm.widthPixels * 0.8), ViewGroup.LayoutParams.WRAP_CONTENT);
            }
        }
    }

    protected void setOutsideColor(float color) {
        this.color = color;
    }

}

public class EnsureDialog extends BaseDialogFragment {

    private TextView mTvCancel;
    private TextView mTvEnsure;
    private TextView mTvMessage;
    private IDialogEnsureClickListener listener;

    @Override
    public int getLayoutId() {
        return R.layout.layout_dialog_ensure;
    }

    @Override
    protected void init(View view) {
        mTvCancel = (TextView) view.findViewById(R.id.tv_cancel);
        mTvEnsure = (TextView) view.findViewById(R.id.tv_ensure);
        mTvMessage = (TextView) view.findViewById(R.id.tv_message);

        Bundle args = getArguments();
        if (args != null) {
            if (args.containsKey("message")) {
                String message = args.getString("message");
                mTvMessage.setText(message);
            }

            if (args.containsKey("left")) {
                String left = args.getString("left");
                if (!TextUtils.isEmpty(left)) {
                    mTvCancel.setText(left);
                }
            }

            if (args.containsKey("right")) {
                String right = args.getString("right");
                if (!TextUtils.isEmpty(right)) {
                    mTvEnsure.setText(right);
                }
            }
        }

        mTvCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (listener != null) {
                    listener.onCancelClick();
                }
            }
        });

        mTvEnsure.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (listener != null) {
                    listener.onEnsureClick();
                }
            }
        });


    }

    public void setOnClickListener(IDialogEnsureClickListener listener) {
        this.listener = listener;
    }

    @Override
    public void onStart() {
        super.onStart();
        initWindowSize();
    }
}

四、实现弹窗

创建EnsureDialog对象，通过bundle把需要的数据传给EnsureDialog

mBtEnsure.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final EnsureDialog ensureDialog = new EnsureDialog();
                Bundle bundle = new Bundle();
                bundle.putString("message", "这是简单的dialog");
                ensureDialog.setArguments(bundle);
                ensureDialog.show(getSupportFragmentManager(), "ensure");

                ensureDialog.setOnClickListener(new IDialogEnsureClickListener() {
                    @Override
                    public void onEnsureClick() {
                        Toast.makeText(MainActivity.this, "点击了OK", Toast.LENGTH_SHORT).show();
                        ensureDialog.dismiss();
                    }

                    @Override
                    public void onCancelClick() {
                        Toast.makeText(MainActivity.this, "点击了Cancel", Toast.LENGTH_SHORT).show();
                        ensureDialog.dismiss();
                    }
                });
            }
        });

备注：可在github上查看具体实现代码地址为   https://github.com/hnsycsxhzcsh/IosDialog，进入github后点击右上角star谢谢支持！

gradle可直接引用

1、根目录的build.gradle中设置

allprojects {
    repositories {
        maven { url "https://jitpack.io" }
    }
}

2、app的build.gradle中引用，最后的版本可能会变化，以github上最新版本为准

implementation "com.github.hnsycsxhzcsh:IosDialog:V1.1"