public interface CallListener {
void getTest(int x, int y);
}
第二步,定义回调接口调用方法
public void setCallLister(CallListener callListener) {
this.callListener = callListener;
sum();
}
第三步,接口方法赋值
private void sum() {
callListener.getTest(2,3);
}
第四步,其他类中通过调用方法调回接口(即接口回调)
可以让类实现回调接口,重写其方法
public class MainActivity extends AppCompatActivity implements CallListener
Listener call = new Listener();
call.setCallLister(this);
@Override
public void getTest(int x, int y) {
int sum = x + y;
Log.e("getTest", "getTest:" + sum);
}
通过匿名内部类的形式实现
Listener call = new Listener();
call.setCallLister(new CallListener() {
@Override
public void getTest(int x, int y) {
int sum = x + y;
Log.e("getTest", "getTest:" + sum);
}
});