android performClick使用說明

標籤：

        performClick 是使用代碼主動去調用控制項的點擊事件（類比人手去觸摸控制項）boolean android.view.View.performClick()

Call this view‘s OnClickListener, if it is defined.

Returns:

True there was an assigned OnClickListener that was called, false otherwise is returned.

---------------------------------------------@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_my);btn1 = (Button) findViewById(R.id.button1);tv1 = (TextView) findViewById(R.id.textView1);btn1.performClick();btn1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {tv1.setText("已經被點擊過了");}});
}
上述方式寫，tv1的文字就是預設文字，只有把setOnClickListener的聲明寫在performClick後面，直接運行程式才能顯示“已被點擊過了”

android performClick使用說明