Android Fragment详解(二)--->生命周期详解
MainActivity如下:
package cc.testsimplefragment1;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;/** * Demo描述: * Fragment生命周期 * * 测试方法: * 在界面中从上至下点击各个按钮 * * 参考资料: * 1 Android疯狂讲义(第二版) * 2 http://blog.163.com/supered_yang@126/blog/static/4126004120131710545228/ * 3 http://blog.csdn.net/t12x3456/article/details/8104574 * Thank you very much * */public class MainActivity extends Activity{private Button mStartActivityButton;private Button mAddFragmentButton;private Button mReplaceAndBackFragmentButton;private Button mReplaceFragmentButton;private Button mFinishButton;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);init();}private void init(){mStartActivityButton = (Button) findViewById(R.id.startActivityButton);mStartActivityButton.setOnClickListener(new ClickListenerImpl());mAddFragmentButton = (Button) findViewById(R.id.addFragmentButton);mAddFragmentButton.setOnClickListener(new ClickListenerImpl());mReplaceAndBackFragmentButton = (Button) findViewById(R.id.replaceAndBackFragmentButton);mReplaceAndBackFragmentButton.setOnClickListener(new ClickListenerImpl());mReplaceFragmentButton = (Button) findViewById(R.id.replaceFragmentButton);mReplaceFragmentButton.setOnClickListener(new ClickListenerImpl());mFinishButton = (Button) findViewById(R.id.finishButton);mFinishButton.setOnClickListener(new ClickListenerImpl());}private class ClickListenerImpl implements OnClickListener{@Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.startActivityButton:Intent intent = new Intent(MainActivity.this, DialogStyleActivity.class);startActivity(intent);break;case R.id.addFragmentButton:TestLifecycleFragment testLifecycleFragment = new TestLifecycleFragment();getFragmentManager().beginTransaction().add(R.id.linearLayoutContainer, testLifecycleFragment).commit();break;case R.id.replaceAndBackFragmentButton:AnotherFragment anotherFragment1 = new AnotherFragment();getFragmentManager().beginTransaction().replace(R.id.linearLayoutContainer, anotherFragment1).addToBackStack("test").commit();break;case R.id.replaceFragmentButton:AnotherFragment anotherFragment2 = new AnotherFragment();getFragmentManager().beginTransaction().replace(R.id.linearLayoutContainer, anotherFragment2).commit();break;case R.id.finishButton:finish();break;default:break;}}}}
TestLifecycleFragment如下:
package cc.testsimplefragment1;import android.app.Activity;import android.app.Fragment;import android.os.Bundle;import android.util.Log;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class TestLifecycleFragment extends Fragment {final String TAG = "log";/** * 该Fragment被添加到Activity时调用. * 只会被调用一次 */@Overridepublic void onAttach(Activity activity) {super.onAttach(activity);Log.d(TAG, "-------onAttach------");}/** * 创建该Fragment时调用. * 只会被调用一次 */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Log.d(TAG, "-------onCreate------");}/** * 每次创建和绘制该Fragment的View组件时调用. * Fragment会显示该方法返回的View */@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle data) {Log.d(TAG, "-------onCreateView------");TextView tv = new TextView(getActivity());tv.setGravity(Gravity.CENTER_HORIZONTAL);tv.setText("这是一个用于测试的Fragment");tv.setTextSize(40);return tv;}/** * 当Fragment所在的Activity被启动完成后 * 调用该方法 */@Overridepublic void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);Log.d(TAG, "-------onActivityCreated------");}/** * 启动Fragment时候调用该方法 */@Overridepublic void onStart() {super.onStart();Log.d(TAG, "-------onStart------");}/** * 恢复Fragment时候调用该方法. * onStart()方法后一定会调用该onResume()方法 */@Overridepublic void onResume() {super.onResume();Log.d(TAG, "-------onResume------");} /** * 暂停Fragment时候调用该方法 */@Overridepublic void onPause() {super.onPause();Log.d(TAG, "-------onPause------");}/** * 停止Fragment时候调用该方法 */@Overridepublic void onStop() {super.onStop();Log.d(TAG, "-------onStop------");}/** * 销毁该Fragment所包含的View调用该方法 */@Overridepublic void onDestroyView() {super.onDestroyView();Log.d(TAG, "-------onDestroyView------");}/** * 销毁该Fragment时调用该方法 * 该方法只会被调用一次 */@Overridepublic void onDestroy() {super.onDestroy();Log.d(TAG, "-------onDestroy------");}/** * 将该Fragment从Activity中被删除,替换时调用该方法 * 在onDestroy()方法后一定会调用该onDetach()方法. * 该方法只会被调用一次 */@Overridepublic void onDetach() {super.onDetach();Log.d(TAG, "-------onDetach------");}}
AnotherFragment如下:
package cc.testsimplefragment1;import android.app.Fragment;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class AnotherFragment extends Fragment {@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle data) {TextView textView = new TextView(getActivity());textView.setGravity(Gravity.CENTER_HORIZONTAL);textView.setText("另外一个Fragment");textView.setTextSize(40);return textView;}}
DialogStyleActivity如下:
package cc.testsimplefragment1;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;/** * 备注说明: * 该Activity是对话框风格的Activity * 所以需要在配置文件中设置: * android:theme="@android:style/Theme.Holo.Dialog" * */public class DialogStyleActivity extends Activity{@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);TextView textView = new TextView(this);textView.setText("对话框风格的Activity");setContentView(textView);}}
main.xml如下:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:id="@+id/linearLayoutContainer" android:layout_width="wrap_content" android:layout_height="160dp" > </LinearLayout> <Button android:id="@+id/addFragmentButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="加载目标Fragment" /> <Button android:id="@+id/startActivityButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="启动对话框风格的Activity" /> <Button android:id="@+id/replaceAndBackFragmentButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="替换目标Fragment,并加入Back栈" /> <Button android:id="@+id/replaceFragmentButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="替换目标Fragment" /> <Button android:id="@+id/finishButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="退出" /></LinearLayout>
AndroidManifest.xml如下:
<?xml version="1.0" encoding="utf-8"?><manifestxmlns:android="http://schemas.android.com/apk/res/android"package="cc.testsimplefragment1"android:versionCode="1"android:versionName="1.0"><uses-sdkandroid:minSdkVersion="11"android:targetSdkVersion="17" /><applicationandroid:icon="@drawable/ic_launcher"android:label="@string/app_name"><activityandroid:name=".MainActivity"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:theme="@android:style/Theme.Holo.Dialog"android:name=".DialogStyleActivity"android:label="@string/app_name" /></application></manifest>