public?class?MainActivity?extends?Activity?implements?View.OnClickListener?{
????private?Button?button;
????private?TextView?tv;
????@Override
????protected?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.activity_main);
????????button?=?(Button)findViewById(R.id.button);
????????tv?=?(TextView)findViewById(R.id.textView);
????????button.setOnClickListener(this);
????}
?????@Override
????public?void?onClick(View?v)?{
????????int?vi?=?tv.getVisibility();
????????if(vi?!=0)
????????{
????????????tv.setVisibility(0);
????????}
????????else
????????????tv.setVisibility(4);
????}
}
public?class?MainActivity?extends?Activity{
?private?Button?button;
????private?TextView?tv;
????@Override
????protected?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.activity_main);
????????button?=?(Button)findViewById(R.id.button);
????????tv?=?(TextView)findViewById(R.id.textView);
????????button.setOnClickListener(new?View.OnClickListener()?{
????????????@Override
????????????public?void?onClick(View?v)?{
????????????????int?vi?=?tv.getVisibility();
????????????????if(vi?!=0)
????????????????{
????????????????????tv.setVisibility(0);
????????????????}
????????????????else
????????????????????tv.setVisibility(4);
????????????}
????????})
????}
}前者是外部類監(jiān)聽， 后者是匿名內(nèi)部類嘛？
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