方法button.performClick(); 模拟点击的使用

public class MainActivity extends AppCompatActivity {
    Button button1;
    Button button2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView tv = (EditText) findViewById(tv);
        button1 = (Button) findViewById(R.id.button1);
        button2 = (Button) findViewById(R.id.button2);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "Button1被点击了", Toast.LENGTH_SHORT).show();
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                tv.setText("点击Button2");
                button1.performClick();
            }
        });
    }
}

效果是，点击Button1的时候，Toast；点击Button2的时候，TextView显示文本，并且模拟点击了Button1，所以也会Toast