不同的绑定点击回调方式
第一种方式：匿名函数
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| public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
ImageView imageView = (ImageView) findViewById(R.id.image_view);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
}
}
|
第二种方式：继承OnClickListener接口，实现onClick函数。使组件直接绑定this。每当被点击时，统一调用onClick，里面进行case逻辑分流。依据View的id与其R.id对比进行。
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| public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private EditText editText;
private ImageView imageView;
private ProgressBar progressBar;
private static int COUNT;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button);
imageView = (ImageView) findViewById(R.id.image_view);
progressBar = (ProgressBar) findViewById(R.id.progress_bar);
button.setOnClickListener(this);
imageView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
if (progressBar.getVisibility() == View.GONE) {
progressBar.setVisibility(View.VISIBLE);
} else {
progressBar.setVisibility(View.GONE);
}
break;
case R.id.image_view:
if(COUNT == 1) {
imageView.setImageResource(R.drawable.img_2);
COUNT = 0;
} else {
imageView.setImageResource(R.drawable.img_1);
COUNT = 1;
}
break;
default:
break;
}
}
}
|