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  • android performClick使用

    performClick 是使用代码主动去调用控件的点击事件(模拟人手去触摸控件)
    -----------------------------------------
    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.
    ---------------------------------------------
    @Override
    protected 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() {
    @Override
    public void onClick(View v) {
    tv1.setText("已经被点击过了");
    }
    });

    }

    上述方式写,tv1的文字就是默认文字,仅仅有把setOnClickListener的声明写在performClick后面,直接执行程序才干显示“已被点击过了”
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  • 原文地址:https://www.cnblogs.com/mfrbuaa/p/4014092.html
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