Android两界面之间的切换
计算机112 孔秋静
该应用主要测试两界面之间的切换
1.创建一个名为layout_switch的工程
在res-->layout内在创建一个xml名为MYActivity并在界面中随意拖放几个控件
回到MainActivity.java
package com.example.layout_switch; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.content.Intent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity implements OnClickListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); b1=(Button) findViewById(R.id.btn1); b1.setOnClickListener(this); } Button b1; @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public void onClick(View arg0) { // TODO Auto-generated method stub // Intent i=new Intent(MainActivity.this,MYActivity.class); // startActivity(i); Intent intent1=new Intent(MainActivity.this,MYActivity.class); } }
添加如上代码
效果图如下
点击Button后切换至
以上基本实现切换。
在实现切换有以下几种情况:
1.无参数Activity跳转
Intent it = new Intent(Activity.Main.this, Activity2.class);
startActivity(it);
2.向下一个Activity传递数据(使用Bundle和Intent.putExtras)
Intent it = new Intent(Activity.Main.this, Activity2.class);
Bundle bundle=new Bundle();
bundle.putString("name", "This is from MainActivity!");
it.putExtras(bundle); // it.putExtra(“test”, "shuju”);
startActivity(it); // startActivityForResult(it,REQUEST_CODE);
对于数据的获取可以采用:
Bundle bundle=getIntent().getExtras();
String name=bundle.getString("name");
3.向上一个Activity返回结果(使用setResult,针对startActivityForResult(it,REQUEST_CODE)启动的Activity)
Intent intent=getIntent();
Bundle bundle2=new Bundle();
bundle2.putString("name", "This is from ShowMsg!");
intent.putExtras(bundle2);
setResult(RESULT_OK, intent);
4.回调上一个Activity的结果处理函数(onActivityResult)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==REQUEST_CODE){
if(resultCode==RESULT_CANCELED)
setTitle("cancle");
else if (resultCode==RESULT_OK) {
String temp=null;
Bundle bundle=data.getExtras();
if(bundle!=null) temp=bundle.getString("name");
setTitle(temp);
}
}
}
posted on 2013-06-07 10:44 孔秋静(1131601213) 阅读(391) 评论(0) 编辑 收藏 举报