savedInstanceState

最新推荐文章于 2023-10-13 22:53:29 发布

jktaihe

最新推荐文章于 2023-10-13 22:53:29 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/jktaihe/article/details/42060485

本文介绍了Android中简单资源管理及Activity的生命周期方法，包括onCreate、onSaveInstanceState和onRestoreInstanceState的使用。

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public class SimpleResource extends Activity
{
private int intValue;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (savedInstanceState != null)
{
intValue = savedInstanceState.getInt("int_value");
}
Log.d("method", "onCreate");

}

@Override
protected void onSaveInstanceState(Bundle outState)
{
Log.d("method", "onSaveInstanceState");
outState.putString("name", "��");
outState.putInt("int_value", intValue);
super.onSaveInstanceState(outState);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
Log.d("method", "onRestoreInstanceState");
if (savedInstanceState != null)
setTitle(savedInstanceState.getString("name"));
super.onRestoreInstanceState(savedInstanceState);
}

public void onClick_ShowActivity(View view)
{
Intent intent = new Intent(this, MyActivity.class);

startActivity(intent);
}

public void onClick_SetValue(View view)
{
intValue = 100;
}

public void onClick_ShowValue(View view)
{
Toast.makeText(this, String.valueOf(intValue), Toast.LENGTH_LONG)
.show();
}