Android自定义TextView仿微信朋友圈文字展开全文功能

2023-09-12 00:09:05 60

//新建java类继承自LinearLayout publicclassShowMoreTextViewextendsLinearLayout{ //用来标记是否为展开状态 privateinthideOrShow=0; privateTextViewtextView; privateTextViewbutton; publicShowMoreTextView(Contextcontext){ super(context); } publicShowMoreTextView(Contextcontext,AttributeSetattrs){ super(context,attrs); //实例化layoutInflater对象，获取到布局填充服务 LayoutInflaterlayoutInflater=(LayoutInflater)context. getSystemService(Context.LAYOUT_INFLATER_SERVICE); //填充自定义的布局xml文件 layoutInflater.inflate(R.layout.showmore,this); textView=(TextView)findViewById(R.id.content); button=(TextView)findViewById(R.id.hide_show); button.setText("显示更多"); //隐藏或显示 hideOrShow(); } //创建setContent方法为TextView填充内容 publicvoidsetContent(Stringcontent){ textView.setText(content); } publicvoidhideOrShow(){ button.setOnClickListener(newOnClickListener(){ @Override publicvoidonClick(Viewv){ //由hideOrShow的值确定按钮和textview的状态 if(hideOrShow==0){ button.setText("收起"); textView.setMaxLines(100); hideOrShow=2; }elseif(hideOrShow==2){ button.setText("显示更多"); textView.setMaxLines(3); hideOrShow=1; }elseif(hideOrShow==1){ button.setText("收起"); textView.setMaxLines(100); hideOrShow=2; } } }); } }

publicclassTestActivityextendsAppCompatActivity{ privateShowMoreTextViewshowMoreTextView; @Override protectedvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); showMoreTextView=(ShowMoreTextView)findViewById(R.id.showmore); showMoreTextView.setContent(" Thereissomuchlife I'velefttolive Andthisfire'sburningstill WhenIwatchyoulookatme IthinkIcouldfindaway Tostandforeverydream Andforsakethissolidground Andgiveupthisfearwithin Ofwhatwouldhappeniftheyendyou I'minlovewithyou "); } }

Android自定义TextView仿微信朋友圈文字展开全文功能

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