Record - Flag

最新推荐文章于 2021-12-23 07:30:00 发布

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最新推荐文章于 2021-12-23 07:30:00 发布

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分类专栏： Android 文章标签： button class

本文链接：https://blog.youkuaiyun.com/wwq_1111/article/details/6157115

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本文通过一个简单的例子展示了在Android应用中如何使用Intent Flags。从第一个活动开始，依次启动了四个活动，最后在第四个活动中通过设置FLAG_ACTIVITY_BROUGHT_TO_FRONT标志来使第二个活动置于前台。

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Intent里可以设置Flag，比如FLAG_ACTIVITY_BROUGHT_TO_FRONT。

以下的例子简单说明了Flag的用法.

FirstActivity:

public class RecordActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.first); Button goSecond = (Button)findViewById(R.id.go_to_second); goSecond.setOnClickListener(mGoSecond); } private OnClickListener mGoSecond = new OnClickListener(){ public void onClick(View v){ Intent i = new Intent(RecordActivity.this, SecondActivity.class); startActivity(i); } }; }

secondActivity:

public class SecondActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.second); Button goThird = (Button)findViewById(R.id.go_to_third); goThird.setOnClickListener(mGoThird); } private OnClickListener mGoThird = new OnClickListener(){ public void onClick(View v){ Intent i = new Intent(SecondActivity.this, ThirdActivity.class); startActivity(i); } }; }

thirdAcitivity:

public class ThirdActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.third); Button goForth = (Button)findViewById(R.id.go_to_forth); goForth.setOnClickListener(mGoForth); } private OnClickListener mGoForth = new OnClickListener(){ public void onClick(View v){ Intent i = new Intent(ThirdActivity.this, ForthActivity.class); startActivity(i); } }; }

forthActivity:

public class ForthActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.forth); Button recordSecond = (Button)findViewById(R.id.forth); recordSecond.setOnClickListener(mRecord); } private OnClickListener mRecord = new OnClickListener(){ public void onClick(View v){ Intent i = new Intent(ForthActivity.this, SecondActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT); startActivity(i); } }; }