{"id":985,"date":"2015-08-18T17:40:56","date_gmt":"2015-08-18T09:40:56","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=985"},"modified":"2015-08-18T17:42:15","modified_gmt":"2015-08-18T09:42:15","slug":"fragment%e6%a0%88","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=985","title":{"rendered":"Fragment\u6808"},"content":{"rendered":"

\u6211\u4eec\u77e5\u9053Android\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4efb\u52a1\u6808\u7528\u4e8e\u4fdd\u5b58Activity\uff0c\u540c\u6837\u4e5f\u4e3aFragment\u63d0\u4f9b\u4e86\u4e00\u4e2a\u56de\u9000\u6808\uff0c\u5982\u679c\u6211\u4eec\u628aFragment\u538b\u5165\u56de\u9000\u6808\u540e\u70b9\u51fb\u8fd4\u56de\u53ef\u4ee5\u663e\u793a\u4e0a\u4e00\u4e2aFragment.
\n
\n\u770b\u4e0bAPIDemo\u4e0b\u7684\u5b9e\u4f8b
\n\"fragment_stack\"<\/a><\/p>\n

\u5e03\u5c40fragment_stack.xml<\/p>\n

[java]<LinearLayout xmlns:android="http:\/\/schemas.android.com\/apk\/res\/android"
\n android:layout_width="match_parent"
\n android:layout_height="match_parent"
\n android:gravity="center_horizontal"
\n android:orientation="vertical"
\n android:padding="4dip" ><\/p>\n

<LinearLayout
\n android:layout_width="wrap_content"
\n android:layout_height="wrap_content"
\n android:layout_weight="0"
\n android:gravity="center_horizontal"
\n android:measureWithLargestChild="true"
\n android:orientation="horizontal"
\n android:padding="4dip" ><\/p>\n

<Button
\n android:id="@+id\/new_fragment"
\n android:layout_width="wrap_content"
\n android:layout_height="wrap_content"
\n android:text="Push" ><\/p>\n

<requestFocus \/>
\n <\/Button><\/p>\n

<Button
\n android:id="@+id\/delete_fragment"
\n android:layout_width="wrap_content"
\n android:layout_height="wrap_content"
\n android:layout_weight="0"
\n android:text="Pop" >
\n <\/Button>
\n <\/LinearLayout><\/p>\n

<FrameLayout
\n android:id="@+id\/simple_fragment"
\n android:layout_width="match_parent"
\n android:layout_height="0px"
\n android:layout_weight="1" >
\n <\/FrameLayout><\/p>\n

<\/LinearLayout>[\/java]<\/p>\n

\u4ee3\u7801:<\/p>\n

[java]public class FragmentStack extends Activity {
\n\tint mStackLevel = 0;<\/p>\n

\t@Override
\n\tprotected void onCreate(Bundle savedInstanceState) {
\n\t\tsuper.onCreate(savedInstanceState);
\n\t\tsetContentView(R.layout.fragment_stack);<\/p>\n

\t\tButton button = (Button) findViewById(R.id.new_fragment);
\n\t\tbutton.setOnClickListener(new OnClickListener() {
\n\t\t\tpublic void onClick(View v) {
\n\t\t\t\tmStackLevel++;
\n\t\t\t\taddFragmentToStack();
\n\t\t\t}
\n\t\t});
\n\t\tbutton = (Button) findViewById(R.id.delete_fragment);
\n\t\tbutton.setOnClickListener(new OnClickListener() {
\n\t\t\tpublic void onClick(View v) {
\n\t\t\t\tmStackLevel–;
\n\t\t\t\tgetFragmentManager().popBackStack(); \/\/\u5f39\u6808
\n\t\t\t}
\n\t\t});
\n\t}<\/p>\n

\tvoid addFragmentToStack() {
\n Fragment newFragment = CountingFragment.newInstance(mStackLevel);
\n FragmentTransaction ft = getFragmentManager().beginTransaction();
\n ft.replace(R.id.simple_fragment, newFragment);
\n ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
\n ft.addToBackStack(null);
\n ft.commit();
\n\t}<\/p>\n

\tpublic static class CountingFragment extends Fragment {
\n\t\tint mNum;
\n\t\tprivate static int[] sColorValue = new int[] {
\n\t\t\t\tandroid.R.color.holo_blue_light,
\n\t\t\t\tandroid.R.color.holo_green_light,
\n\t\t\t\tandroid.R.color.holo_orange_light,
\n\t\t\t\tandroid.R.color.holo_red_light };<\/p>\n

\t\t\/**
\n\t\t * Create a new instance of CountingFragment, providing "num" as an
\n\t\t * argument.
\n\t\t *\/
\n\t\tstatic CountingFragment newInstance(int num) {
\n\t\t\tCountingFragment f = new CountingFragment();<\/p>\n

\t\t\t\/\/ Supply num input as an argument.
\n\t\t\tBundle args = new Bundle();
\n\t\t\targs.putInt("num", num);
\n\t\t\tf.setArguments(args);
\n\t\t\treturn f;
\n\t\t}<\/p>\n

\t\t\/**
\n\t\t * When creating, retrieve this instance’s number from its arguments.
\n\t\t *\/
\n\t\t@Override
\n\t\tpublic void onCreate(Bundle savedInstanceState) {
\n\t\t\tsuper.onCreate(savedInstanceState);
\n\t\t\tmNum = getArguments() != null ? getArguments().getInt("num") : 1;
\n\t\t}<\/p>\n

\t\t\/**
\n\t\t * The Fragment’s UI is just a simple text view showing its instance
\n\t\t * number.
\n\t\t *\/
\n\t\t@Override
\n\t\tpublic View onCreateView(LayoutInflater inflater, ViewGroup container,
\n\t\t\t\tBundle savedInstanceState) {
\n\t\t\tView v = inflater.inflate(R.layout.fragment_stack_layout, container, false);
\n\t\t\tView tv = v.findViewById(R.id.text);
\n\t\t\t((TextView) tv).setText("Fragment #" + mNum);
\n\t\t\ttv.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.gallery_thumb));
\n\t\t\tLog.v("TAG", "mNum % 3 " + mNum % 3);
\n\t\t\ttv.setBackgroundColor(getActivity().getResources().getColor(sColorValue[mNum % 3]));
\n\t\t\treturn v;
\n\t\t}
\n\t}<\/p>\n

}
\n[\/java]<\/p>\n

\u538b\u6808\u4ee3\u7801<\/p>\n

[java]FragmentTransaction ft = getFragmentManager().beginTransaction();
\nft.addToBackStack(null);[\/java]<\/p>\n

\u5f39\u6808\u4ee3\u7801<\/p>\n

[java]getFragmentManager().popBackStack();[\/java]<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6211\u4eec\u77e5\u9053Android\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4efb\u52a1\u6808\u7528\u4e8e\u4fdd\u5b58Activity\uff0c\u540c\u6837\u4e5f\u4e3aFragment\u63d0\u4f9b\u4e86\u4e00\u4e2a\u56de\u9000\u6808\uff0c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[67],"tags":[],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/985"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=985"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/985\/revisions"}],"predecessor-version":[{"id":989,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/985\/revisions\/989"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}