zhangyuqing
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flutter-book
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异常处理示例修改

This commit is contained in:
18871002288 2019-09-24 09:27:48 +08:00
parent c76a630778
commit 605ba6cab9
3 changed files with 84 additions and 63 deletions
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88
第13章Flutter插件开发/flutter_plugin_demo/.idea/workspace.xml
View File

@ -16,32 +16,7 @@
<option name="LAST_RESOLUTION" value="IGNORE" />
</component>
<component name="FileEditorManager">
<leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
<file leaf-file-name="flutter_plugin_demo.dart" pinned="false" current-in-tab="true">
<entry file="file://$PROJECT_DIR$/lib/flutter_plugin_demo.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="102">
<caret line="6" column="39" lean-forward="true" selection-start-line="6" selection-start-column="39" selection-end-line="6" selection-end-column="39" />
<folding>
<element signature="e#0#20#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
</file>
<file leaf-file-name="main.dart" pinned="false" current-in-tab="false">
<entry file="file://$PROJECT_DIR$/example/lib/main.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="459">
<caret line="27" column="55" lean-forward="false" selection-start-line="27" selection-start-column="55" selection-end-line="27" selection-end-column="55" />
<folding>
<element signature="e#0#39#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
</file>
</leaf>
<leaf SIDE_TABS_SIZE_LIMIT_KEY="300" />
</component>
<component name="GradleLocalSettings">
<option name="externalProjectsViewState">
@ -51,8 +26,8 @@
<component name="IdeDocumentHistory">
<option name="CHANGED_PATHS">
<list>
<option value="$PROJECT_DIR$/example/lib/main.dart" />
<option value="$PROJECT_DIR$/lib/flutter_plugin_demo.dart" />
<option value="$PROJECT_DIR$/example/lib/main.dart" />
</list>
</option>
</component>
@ -76,9 +51,10 @@
<foldersAlwaysOnTop value="true" />
</navigator>
<panes>
<pane id="Scratches" />
<pane id="PackagesPane" />
<pane id="Scope" />
<pane id="AndroidView" />
<pane id="Scratches" />
<pane id="ProjectPane">
<subPane>
<expand>
@ -91,6 +67,12 @@
<item name="flutter_plugin_demo" type="462c0819:PsiDirectoryNode" />
<item name="example" type="462c0819:PsiDirectoryNode" />
</path>
<path>
<item name="flutter_plugin_demo" type="b2602c69:ProjectViewProjectNode" />
<item name="flutter_plugin_demo" type="462c0819:PsiDirectoryNode" />
<item name="example" type="462c0819:PsiDirectoryNode" />
<item name="lib" type="462c0819:PsiDirectoryNode" />
</path>
<path>
<item name="flutter_plugin_demo" type="b2602c69:ProjectViewProjectNode" />
<item name="flutter_plugin_demo" type="462c0819:PsiDirectoryNode" />
@ -101,7 +83,6 @@
</subPane>
<option name="show-excluded-files" value="false" />
</pane>
<pane id="AndroidView" />
</panes>
</component>
<component name="PropertiesComponent">
@ -227,8 +208,7 @@
<servers />
</component>
<component name="ToolWindowManager">
<frame x="0" y="23" width="1440" height="839" extended-state="6" />
<editor active="true" />
<frame x="0" y="23" width="1440" height="837" extended-state="6" />
<layout>
<window_info id="Android Profiler" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="false" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
<window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
@ -250,7 +230,7 @@
<window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
<window_info id="Device File Explorer" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="true" content_ui="tabs" />
<window_info id="Theme Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.28294036" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.2823366" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
<window_info id="Flutter Inspector" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.20171674" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
@ -271,6 +251,26 @@
<watches-manager />
</component>
<component name="editorHistoryManager">
<entry file="file://$PROJECT_DIR$/lib/flutter_plugin_demo.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
<caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
<folding>
<element signature="e#0#20#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/lib/main.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="459">
<caret line="27" column="55" lean-forward="false" selection-start-line="27" selection-start-column="55" selection-end-line="27" selection-end-column="55" />
<folding>
<element signature="e#0#39#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/lib/flutter_plugin_demo.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
@ -298,25 +298,25 @@
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/lib/main.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="459">
<caret line="27" column="55" lean-forward="false" selection-start-line="27" selection-start-column="55" selection-end-line="27" selection-end-column="55" />
<folding>
<element signature="e#0#39#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/lib/flutter_plugin_demo.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="102">
<caret line="6" column="39" lean-forward="true" selection-start-line="6" selection-start-column="39" selection-end-line="6" selection-end-column="39" />
<state relative-caret-position="289">
<caret line="17" column="0" lean-forward="false" selection-start-line="17" selection-start-column="0" selection-end-line="17" selection-end-column="0" />
<folding>
<element signature="e#0#20#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/lib/main.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="561">
<caret line="33" column="0" lean-forward="true" selection-start-line="33" selection-start-column="0" selection-end-line="33" selection-end-column="0" />
<folding>
<element signature="e#0#39#0" expanded="true" />
</folding>
</state>
</provider>
</entry>
</component>
</project>

4
第13章Flutter插件开发/flutter_plugin_demo/example/lib/main.dart
View File

@ -23,11 +23,13 @@ class _MyAppState extends State<MyApp> {
//获取底层的方法是异步的 所以调用的方法也要异步处理才行
Future<void> initPlatformState() async {
String platformVersion;
//底层方法有可能会调用失败 所以要使用try/catch语句
//底层方法有可能会调用失败 所以要使用try on catch语句
try {
platformVersion = await FlutterPluginDemo.platformVersion;
} on PlatformException {
platformVersion = 'Failed to get platform version.';
} catch (e){
print('Exception: $e');
}
setState(() {

55
第13章Flutter插件开发/nativeweb/.idea/workspace.xml
View File

@ -16,7 +16,7 @@
<option name="LAST_RESOLUTION" value="IGNORE" />
</component>
<component name="FileEditorManager">
<leaf SIDE_TABS_SIZE_LIMIT_KEY="300" />
<leaf />
</component>
<component name="FindInProjectRecents">
<findStrings>
@ -69,11 +69,6 @@
<item name="nativeweb" type="b2602c69:ProjectViewProjectNode" />
<item name="nativeweb" type="462c0819:PsiDirectoryNode" />
</path>
<path>
<item name="nativeweb" type="b2602c69:ProjectViewProjectNode" />
<item name="nativeweb" type="462c0819:PsiDirectoryNode" />
<item name="lib" type="462c0819:PsiDirectoryNode" />
</path>
</expand>
<select />
</subPane>
@ -223,11 +218,11 @@
<window_info id="Captures" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
<window_info id="Capture Tool" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
<window_info id="Designer" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
<window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.22889842" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
<window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.22103004" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
<window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
<window_info id="Device File Explorer" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="true" content_ui="tabs" />
<window_info id="Theme Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Debug" active="true" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.30598053" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.14603616" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
<window_info id="Flutter Inspector" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.1695279" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
<window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
@ -248,6 +243,22 @@
<watches-manager />
</component>
<component name="editorHistoryManager">
<entry file="file://$PROJECT_DIR$/lib/nativeweb.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
<caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
<folding />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/lib/nativeweb.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
<caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
<folding />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/lib/main.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
@ -345,14 +356,6 @@
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/README.md" />
<entry file="file://$PROJECT_DIR$/example/android/app/src/main/AndroidManifest.xml">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
<caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
<folding />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/lib/main.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="369">
@ -361,10 +364,26 @@
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/android/src/main/AndroidManifest.xml">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
<caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
<folding />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/example/android/app/src/main/AndroidManifest.xml">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="0">
<caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
<folding />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/lib/nativeweb.dart">
<provider selected="true" editor-type-id="text-editor">
<state relative-caret-position="437">
<caret line="66" column="21" lean-forward="false" selection-start-line="66" selection-start-column="21" selection-end-line="66" selection-end-column="21" />
<state relative-caret-position="663">
<caret line="42" column="21" lean-forward="true" selection-start-line="42" selection-start-column="21" selection-end-line="42" selection-end-column="21" />
<folding />
</state>
</provider>