(自定义view)点击“更多”查看更多，自定义collapsibletextview;

首先自定义view，直接上代码

public class collapsible extends LinearLayout{

    private LinearLayout containner;
    private TextView textView1;
    private TextView textView2;
    public int showType = 0;

    public collapsible(Context context, AttributeSet attrs) {
        super(context, attrs);
        containner = (LinearLayout) inflate(context,R.layout.collapsible_main,this);
        textView1 = (TextView) containner.findViewById(R.id.show_view);
        textView2 = (TextView) containner.findViewById(R.id.show_button);
        textView2.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if(showType ==0){
                    showType = 1;
                }else {
                    showType = 0;
                }
                requestLayout();
            }
        });
        TypedArray typedArray = context.obtainStyledAttributes(attrs,R.styleable.collapsible);
        textView1.setText(typedArray.getString(R.styleable.collapsible_collapsibletext));
        typedArray.recycle();
    }
    public collapsible(Context context){
        super(context,null);
    }
    public void setTextView1(String str){
        textView1.setText(str);
        requestLayout();
    }
    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);
       switch (showType){
           case 0:
               textView1.setMaxLines(4);
               break;

           case 1:
               textView1.setMaxLines(Integer.MAX_VALUE);
               break;
       }
    }