底部Dialog（无布局文件）

效果： IMG_20181011_154100.jpg

public class BottomDialog extends Dialog {

    private List<String> dataSource;
    private ItemClick click;

    private boolean isaddCancelItem;

    public BottomDialog(@NonNull Context context) {
        super(context, R.style.XAlert);//去除默认主题，不去除会有黑色框
    }

    public BottomDialog(@NonNull Context context, int themeResId) {
        super(context, R.style.XAlert);
    }

    public BottomDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setWindowAttributes();
        getWindow().getDecorView().setPadding(0, 0, 0, 0);
        View contentView = createDialogView();
        onViewCreated(contentView);
        if(isaddCancelItem){addCancelItem(contentView);}
        setContentView(contentView);
    }

    private void setWindowAttributes() {
        Window window = getWindow();
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        WindowManager.LayoutParams attributes = window.getAttributes();
        attributes.gravity = Gravity.BOTTOM;
        attributes.width = getContext().getResources().getDisplayMetrics().widthPixels;
        window.setAttributes(attributes);

    }

    int i=0;
    private void onViewCreated(View contentView) {
        LinearLayoutCompat.LayoutParams params=new LinearLayoutCompat.LayoutParams(getContext().getResources().getDisplayMetrics().widthPixels,LinearLayout.LayoutParams.WRAP_CONTENT);
        if(dataSource!=null){
            for(i=0;i<dataSource.size();i++){
                TextView textView=new TextView(getContext());
                textView.setLayoutParams(params);
                textView.setText(dataSource.get(i));
                textView.setTextSize(TypedValue.COMPLEX_UNIT_SP,18);
                textView.setTextColor(Color.parseColor("#ff3b30"));
                textView.setGravity(Gravity.CENTER);
                textView.setBackgroundColor(Color.WHITE);
                textView.setPadding(0,dp2px(10),0,dp2px(10));

                textView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if(click!=null){click.onclick(i);}
                        dismiss();
                    }
                });
                ((ViewGroup) contentView).addView(textView);
                if(dataSource.size()-1>=1){
                    View view=new View(getContext());
                    view.setBackgroundColor(Color.parseColor("#dfe2e8"));
                    view.setLayoutParams(new LinearLayoutCompat.LayoutParams(getContext().getResources().getDisplayMetrics().widthPixels,dp2px(5)));
                    ((ViewGroup) contentView).addView(view);
                }
            }
        }

    }

    public void addCancelItem(View contentView){

        View view=new View(getContext());
        view.setBackgroundColor(Color.parseColor("#dfe2e8"));
        view.setLayoutParams(new LinearLayoutCompat.LayoutParams(getContext().getResources().getDisplayMetrics().widthPixels,dp2px(5)));
        ((ViewGroup) contentView).addView(view);

        TextView cancelview=new TextView(getContext());
        cancelview.setLayoutParams(new LinearLayoutCompat.LayoutParams(getContext().getResources().getDisplayMetrics().widthPixels,LinearLayout.LayoutParams.WRAP_CONTENT));
        cancelview.setText("取消");
        cancelview.setTextSize(TypedValue.COMPLEX_UNIT_SP,18);
        cancelview.setTextColor(Color.parseColor("#505864"));
        cancelview.setBackgroundColor(Color.WHITE);
        cancelview.setGravity(Gravity.CENTER);
        cancelview.setPadding(0,dp2px(10),0,dp2px(10));
        cancelview.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dismiss();

            }
        });
        ((ViewGroup) contentView).addView(cancelview);
    }





    private View createDialogView(){
        LinearLayout dialogView=new LinearLayout(getContext());
        dialogView.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,FrameLayout.LayoutParams.WRAP_CONTENT));
        dialogView.setBackgroundColor(Color.parseColor("#dfe2e8"));
        dialogView.setOrientation(LinearLayout.VERTICAL);
        return dialogView;
    }

    public  BottomDialog setDataSource(List<String> dataSource){
        this.dataSource = dataSource;
        return this;
    }

    public BottomDialog IsaddCancelItem(Boolean isaddCancelItem){
        this.isaddCancelItem=isaddCancelItem;
        return this;
    }

    public BottomDialog setClick(ItemClick click) {
        this.click = click;
        return this;
    }

    public interface ItemClick{
        public void onclick(int position);
    }


    protected int dp2px(float dp) {
        final float scale = getContext().getResources().getDisplayMetrics().density;
        return (int) (dp * scale + 0.5f);
    }

}