自定义View双梯形布局+自定义标题栏（点击事件）

//自定义标题栏

public class MyTitleView extends LinearLayout implements View.OnClickListener{
    public MyTitleView(Context context) {
        super(context);
    }

    public MyTitleView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MyTitleView);
        String text = typedArray.getString(R.styleable.MyTitleView_title_text);
        String left = typedArray.getString(R.styleable.MyTitleView_title_left_btn);
        String right = typedArray.getString(R.styleable.MyTitleView_title_right_btn);
        View inflate = inflate(context, R.layout.main_item, this);
        TextView title = inflate.findViewById(R.id.tv_title);
        Button btn1=inflate.findViewById(R.id.left_btn);
        Button btn2=inflate.findViewById(R.id.right_btn);
        title.setText(text);
        title.setTextColor(Color.BLACK);
        btn1.setText(left);
        btn2.setText(right);
        title.setOnClickListener(this);
        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.left_btn:
                if (onBtnOnclick!=null){
                    onBtnOnclick.getLeftBtn();
                }
                break;
            case R.id.right_btn:
                if (onBtnOnclick!=null){
                    onBtnOnclick.getRightBtn();
                }
                break;
            case R.id.tv_title:
                if (onBtnOnclick!=null){
                    onBtnOnclick.getText();
                }
                break;

        }
    }
    public interface onBtnOnclick{
        void getLeftBtn();
        void getRightBtn();
        void getText();
    }
    private onBtnOnclick onBtnOnclick;
    public void setOnBtnOnclick(onBtnOnclick onBtnOnclick){
        this.onBtnOnclick=onBtnOnclick;
    }
}

//梯形布局

public class FlowLayout extends ViewGroup{

    private int widthSize;

    public FlowLayout(Context context) {
        super(context);
    }

    public FlowLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FlowLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        measureChildren(widthMeasureSpec, heightMeasureSpec);
        widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int width = 0;
        int height = 0;
        int lineWidth = 0;
        int lineHeight = 0;
        int totalHeight = 0;
        View childView;
        int childWidth = 0;
        int childHeight = 0;

        for (int i = 0; i < getChildCount(); i++) {
            childView = getChildAt(i);
            childWidth = childView.getMeasuredWidth();
            childHeight = childView.getMeasuredHeight();
            if (lineWidth+childWidth>= widthSize) {
                width = widthSize;
                totalHeight += lineHeight;
                lineHeight = childHeight;
                lineWidth = childWidth;

            } else {
                lineWidth += childWidth;
                lineHeight = Math.max(lineHeight, childHeight);
                width = Math.max(width, lineWidth);
            }
            if (i == getChildCount() - 1) {
                totalHeight += lineHeight;
                height = totalHeight;
            }

        }

        width = widthMode == MeasureSpec.EXACTLY ? widthSize : width;
        height = heightMode == MeasureSpec.EXACTLY ? heightSize : height;
        setMeasuredDimension(width, height);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int lineWidth = 0;
        int lineHeight = 0;
        int totalHeight = 0;
        View childView;
        int childWidth = 0;
        int childHeight = 0;

        for (int i = 0; i < getChildCount(); i++) {
            childView = getChildAt(i);
            childWidth = widthSize/2;
            childHeight = childView.getMeasuredHeight();
            if (i%2==0) {
                totalHeight += childHeight;
                lineWidth = 0;
                layoutChildView(childView, lineWidth, totalHeight, lineWidth + childWidth, totalHeight + childHeight);
            } else {
                totalHeight += childHeight;
                lineWidth = childWidth;
                layoutChildView(childView, lineWidth, totalHeight, lineWidth + childWidth, totalHeight + childHeight);
            }
        }

    }

    public void layoutChildView(View child, int l, int t, int r, int b) {
        child.layout(l, t, r, b);
    }
}

//MainActivity

public class MainActivity extends AppCompatActivity {

    private MyTitleView myTitleView;
    private FlowLayout flowLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myTitleView = findViewById(R.id.mytitleview);
        flowLayout = findViewById(R.id.flowlayout);
        myTitleView.setOnBtnOnclick(new MyTitleView.onBtnOnclick() {
            @Override
            public void getLeftBtn() {
                boolean b;
                if (flowLayout.getChildAt(0)!=null) {
                    b=true;
                }else{
                    b=false;
                    Toast.makeText(MainActivity.this,"数据已清空",Toast.LENGTH_SHORT).show();
                }
                if (b){
                    flowLayout.removeViewAt(0);
                }
            }

            @Override
            public void getRightBtn() {
                Toast.makeText(MainActivity.this,"加一",Toast.LENGTH_SHORT).show();
                TextView textView= new TextView(MainActivity.this);
                textView.setText("加一个");
                textView.setTextSize(26);
                textView.setBackgroundColor(Color.RED);
                textView.setWidth(flowLayout.getWidth()/2);
                textView.setHeight(60);
                flowLayout.addView(textView);
            }

            @Override
            public void getText() {
                Toast.makeText(MainActivity.this,"清空",Toast.LENGTH_SHORT).show();
                flowLayout.removeAllViews();
            }
        });
    }
}

//布局

</LinearLayout>

//子布局

//自定义属性

自定义View双梯形布局+自定义标题栏（点击事件）

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