鸿蒙app获取文本控件按钮控件_修改控件名称_按钮触发事件_

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package com.example.myapplication.slice;import com.example.myapplication.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Button;
import ohos.agp.components.Component;
import ohos.agp.components.DirectionalLayout;import ohos.agp.components.Text;
import ohos.agp.utils.LayoutAlignment;
import ohos.agp.window.dialog.ToastDialog;
import ohos.app.Context;
import ohos.hiviewdfx.HiLog;
import ohos.hiviewdfx.HiLogLabel;public class MainAbilitySlice extends AbilitySlice {static final HiLogLabel loglabel2 = new HiLogLabel(HiLog.LOG_APP,0x001101,"MainAbility");@Overridepublic void onStart(Intent intent) {super.onStart(intent);super.setUIContent(ResourceTable.Layout_ability_main);HiLog.info(loglabel2,"onStart-----------------------------------");int ppi = getContext().getResourceManager().getDeviceCapability().screenDensity;HiLog.info(loglabel2,"屏幕密度："+Integer.toString(ppi));//  Text text2 = new Text();DirectionalLayout.LayoutConfig configForText = new DirectionalLayout.LayoutConfig(toPixels(100,getContext()),toPixels(16,getContext()));//text2.setLayoutConfig(configForText);//如果报错，则导入import ohos.agp.components.Text;// text2.setText text1 = (Text) findComponentById(ResourceTable.Id_text_1);Text text2 = (Text) findComponentById(ResourceTable.Id_text_2);Text text3 = (Text) findComponentById(ResourceTable.Id_text_3);Text text3a = (Text) findComponentById(ResourceTable.Id_text_3a);text1.setText("美好时光1");text2.setText("万事如意");text3.setText("好运常在");text3a.setText("鸿蒙app demo");Button button = (Button) findComponentById(ResourceTable.Id_btn1);button.setText("启动");button.setClickedListener(new Component.ClickedListener() {@Overridepublic void onClick(Component component) {new ToastDialog(getContext()).setText("This is a ToastDialog").setAlignment(LayoutAlignment.CENTER).show();}});}/***虚拟像素转物理像素*/private  static int toPixels(int value, Context context){return value * context.getResourceManager().getDeviceCapability().screenDensity/160;}@Overridepublic void onActive() {super.onActive();}@Overridepublic void onForeground(Intent intent) {super.onForeground(intent);}
}

ability_main.xml布局文件

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayoutxmlns:ohos="http://schemas.huawei.com/res/ohos"ohos:height="match_parent"ohos:width="match_parent"ohos:scrollbar_background_color="#FF4385E7"ohos:orientation="vertical"><Buttonohos:id="$+id:btn1"ohos:text="$string:btn_name"ohos:height="match_content"ohos:width="match_parent"ohos:text_size ="40vp"ohos:background_element="$graphic:capsule_button_element"ohos:layout_alignment="horizontal_center"/><Textohos:id="$+id:text_1"ohos:height="match_content"ohos:width="match_content"ohos:background_element="$graphic:background_ability_main"ohos:layout_alignment="horizontal_center"ohos:text="$string:mainability_HelloWorld"ohos:text_size="40vp"/><Textohos:id="$+id:text_2"ohos:height="match_content"ohos:width="match_content"ohos:background_element="$graphic:background_ability_main"ohos:layout_alignment="horizontal_center"ohos:text="$string:mainability_HelloWorld2"ohos:text_size="40vp"/><Textohos:id="$+id:text_3"ohos:height="match_content"ohos:width="match_content"ohos:background_element="$graphic:background_ability_main"ohos:layout_alignment="horizontal_center"ohos:text="$string:mainability_HelloWorld3"ohos:text_size="40vp"/><Textohos:id="$+id:text_3a"ohos:height="match_content"ohos:width="match_content"ohos:background_element="$graphic:background_ability_main"ohos:text="$string:mainability_HelloWorld3a"ohos:text_size="40vp"ohos:layout_alignment="horizontal_center"/></DirectionalLayout>