一个Activity内多个View互相切换，我查的网上的资料都是使用setContentView+LayoutInflater结合操作，比如这段代码。
enter code here
public class MainActivity extends Activity {
View layoutMain = null;
View layoutSecond = null;
Button btn_mainActivity = null;
Button btn_secondActivity;
boolean firstFlag = true;
long time = (long)0.0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LayoutInflater inflater = this.getLayoutInflater();
layoutMain = inflater.inflate(R.layout.activity_main, null);
layoutSecond = inflater.inflate(R.layout.activity_second, null);
setContentView(layoutMain);
btn_mainActivity = (Button)findViewById(R.id.btn_mainAc_1);
btn_mainActivity.setOnClickListener(new ButtonListen());
}
class ButtonListen implements OnClickListener{
public void onClick(View v) {
// TODO Auto-generated method stub
time = System.currentTimeMillis();
switch(v.getId()){
case R.id.btn_mainAc_1:
Jump2Second();
break;
case R.id.btn_secondA_1:
Jump2Main();
break;
default:
break;
}
}
}
public void Jump2Second(){
setContentView(layoutSecond);
long currTime = System.currentTimeMillis();
Toast.makeText(MainActivity.this,
"时间:"+String.valueOf(currTime-time)+"秒",
Toast.LENGTH_SHORT).show();
if(firstFlag){
btn_secondActivity = (Button)findViewById(R.id.btn_secondA_1);
btn_secondActivity.setOnClickListener(new ButtonListen());
firstFlag = false;
}
}
public void Jump2Main(){
setContentView(layoutMain);
long currTime = System.currentTimeMillis();
Toast.makeText(MainActivity.this,
"时间:" +String.valueOf(currTime-time)+"秒",
Toast.LENGTH_SHORT).show();
}
}
enter code here
但是我自己练习了一个，没有用到Inflater，直接用setcontentview切换，可以吗？和上面的方法有什么不同吗？为什么一定要通过LayoutInflater转换成View，再传到setcontentview中呢，setcontentview不是有一个传ID的重载方法吗？
下面是我的代码：
enter code here
public class MainActivity extends Activity {
private EditText myedit = null;
private Button mybut1 = null;
private Button mybut2 = null;
// private LayoutInflater inflater = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myedit = (EditText) findViewById(R.id.myedit);
mybut1 = (Button) findViewById(R.id.mybut1);
mybut1.setOnClickListener(new buttonlisener());
}
public class buttonlisener implements OnClickListener {
@Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.mybut1:
setContentView(R.layout.second);
mybut2 = (Button)MainActivity.this.findViewById(R.id.mybut2);
mybut2.setOnClickListener(new buttonlisener());
break;
case R.id.mybut2:
setContentView(R.layout.activity_main);
mybut1 = (Button) findViewById(R.id.mybut1);
mybut1.setOnClickListener(new buttonlisener());
break;
default:
break;
}
}
}
}
