package cn.testconfigurationchange;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.Activity;
import android.content.res.Configuration;
/**
* Demo描述:
* 测试Configuration和屏幕旋转
*
* 测试步骤:
* 1 点击Button利用Configuration查看手机上的配置信息
* 2 在manifest为Activity配置 android:configChanges="orientation"
* 由于设备和系统版本的差异,少数情况下该设置无效,建议设置为：
* android:configChanges="keyboardHidden|orientation|screenSize"
* 表示当前Activity可以对屏幕是否旋转进行监听(当然也可对其他系统信息进行监听)
* 配置后屏幕旋转时会调用onConfigurationChanged()方法.
* 若不配置,那么每次屏幕旋转的时候都会调用Activity的onCreate()方法
* 而不会调用onConfigurationChanged()
* 3 取消在2中的设置.此时每次旋转屏幕都会调用onCreate(),并在屏幕旋转前
* 调用onSaveInstanceState()保存现场状态,在选中后调用、
* onRestoreInstanceState()恢复现场.
* 所以此时调用顺序为:
* onSaveInstanceState->onCreate()->onRestoreInstanceState()
* 除此以外:当系统内存紧张时可暂时杀死该Activity,内存允许时重启
* 该Activity.在这样情况下也是该调用顺序,原理亦类似.
*
* 备注说明:
* 该Demo的测试为1和2.若要测试3去掉manifest为Activity配置的
* android:configChanges="orientation" 即可
*
*/
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
System.
out.
println("---> onCreate()"); init();
}
private void init(){
mButton
=(Button) findViewById
(R.
id.
button); mButton.setOnClickListener(new ClickListenerImpl());
}
private class ClickListenerImpl implements OnClickListener{
@Override
public void onClick
(View v
) { getConfigurationInfo();
}
}
private void getConfigurationInfo(){
Configuration configuration=getResources().getConfiguration();
//获取屏幕方向
int l=configuration.ORIENTATION_LANDSCAPE;
int p=configuration.ORIENTATION_PORTRAIT;
if (configuration.orientation==l) {
}
if (configuration.orientation==p) {
}
//获取国家码和网络码
int countryNum=configuration.mcc;
int netNum=configuration.mnc;
System.
out.
println("国家码="+countryNum
+",网络码="+netNum
); }
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
System.
out.
println("---> onConfigurationChanged()"); }
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("name", "zxx");
outState.putInt("id", 9527);
System.
out.
println("---> onSaveInstanceState()"); }
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
String name
=savedInstanceState.
getString("name"); int id=savedInstanceState.getInt("id");
System.
out.
println("---> onRestoreInstanceState()"); System.
out.
println("名字="+name
+",编号="+id
);
}
}
//java/7813