StageApplication初始化支持以下三种方式
1. 通过继承StageApplication的方式进行初始化
import ohos.stage.ability.adapter.StageApplication;public class HiStageApplication extends StageApplication {@Overridepublic void onCreate() {super.onCreate();}
}
2. 继承Android原生Application方式，在onCreate方法中创建StageApplicationDelegate实例进行初始化
import android.app.Application;
import ohos.stage.ability.adapter.StageApplicationDelegate;public class HiStageApplication extends Application {private StageApplicationDelegate appDelegate_ = null;@Overridepublic void onCreate() {super.onCreate();appDelegate_ = new StageApplicationDelegate();appDelegate_.initApplication(this);}
}
3. 在Activity中创建StageApplicationDelegate实例进行初始化
import android.app.Activity;
import ohos.stage.ability.adapter.StageApplicationDelegate;public class EntryEntryAbilityActivity extends Activity {private StageApplicationDelegate appDelegate_ = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {appDelegate_ = new StageApplicationDelegate();appDelegate_.initApplication(this.getApplication());super.onCreate(savedInstanceState);}
}
通过原生Activity拉起Ability并传递参数
使用原生Activity拉起Ability时，需使用原生应用的startActivity方法，参数的传递需要通过Intent中的putExtra()进行设置，目前有两种方式进行参数的传递，具体如下：
1. 使用手动方式
参数格式
key值为params
value为json格式
{"params":[{"key":键,"type":参数类型值,"value":值},{...}]
}
示例代码
- Java
public class EntryEntryAbilityActivity extends AppCompatActivity {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Intent intent = new Intent();intent.setClass(this, EntryEntryAbilityTwoActivity.class);intent.putExtra("params","{\"params\":[{\"key\":\"keyfirst\",\"type\":1,\"value\":\"keyvalue\"}," +"{\"key\":\"keysecond\",\"type\":9,\"value\":\"2.3\"}," +"{\"key\":\"keythird\",\"type\":5,\"value\":\"2\"}," +"{\"key\":\"keyfourth\",\"type\":10,\"value\":\"test\"}]}");startActivity(intent);}
}
- ArkTS
# xxx.ets
export default class EntryAbility extends UIAbility {onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {console.log("value = " + want.parameters?.keyfirst)console.log("value = " + want.parameters?.keysecond)console.log("value = " + want.parameters?.keythird)console.log("value = " + want.parameters?.keyfourth)}onWindowStageCreate(windowStage: window.WindowStage): void {...}
...
}
支持的参数类型列表
| 参数类型 | 参数类型值 |
|---|---|
| boolean | 1 |
| int | 5 |
| double | 9 |
| string | 10 |
2. WantParams工具类
推荐使用。
参数格式
putExtra中的key值为"params",对应的value为WantParams字符串。
WantParams wantParams = new WantParams();wantParams.addValue("key1", "value").addValue("key2", 123).addValue("key3", false)...
示例代码
- Java
此示例展示了在启动一个新的 Ability 时，如何通过 WantParams 实现参数传递。具体涉及使用 WantParams 中的 addValue、getValue 和 toWantParamsString 接口，完成数据的自定义、获取和修改。
public class MainAbilityActivity extends StageActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Intent intent = new Intent();intent.setClass(this, EntryEntryAbilityActivity.class);// 设置自定义数据WantParams wantParams = new WantParams();wantParams.addValue("stringKey", "normal").addValue("intKey", -2147483648).addValue("doubleKey", -6.9).addValue("boolKey", true).addValue("arrayKey", new boolean[] { false, true }).addValue("wantParamsKey",new WantParams().addValue("stringKey2", "It's me."));// 获取指定的键对应的值并修改Object obj = wantParams.getValue("stringKey");if (obj instanceof String) {wantParams.setValue("stringKey", "new string value");}obj = wantParams.getValue("intKey");if (obj instanceof Integer) {wantParams.setValue("intKey", 123);}obj = wantParams.getValue("arrayKey");if (obj instanceof boolean[]) {wantParams.setValue("arrayKey", new boolean[] { false, false });}obj = wantParams.getValue("wantParamsKey");if (obj instanceof WantParams) {wantParams.setValue("wantParamsKey", new WantParams().addValue("intKey", 999));}intent.putExtra("params", wantParams.toWantParamsString());startActivity(intent);}
}
- ArkTS
# xxx.ets
export default class EntryAbility extends UIAbility {onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {console.log("value = " + want.parameters?.stringKey)console.log("value = " + want.parameters?.intKey)console.log("value = " + want.parameters?.doubleKey)console.log("value = " + want.parameters?.boolKey)console.log("value = " + JSON.stringify(want.parameters?.arrayKey))console.log("value = " + JSON.stringify(want.parameters?.wantParamsKey))}
}
支持的参数类型
WantParams支持的类型有：
boolean、int、float、double、String、WantParams、boolean[]、int[]、float[]、double[]、String[]。
WantParams提供的接口详细如下：
| 接口 | 返回值 | 参数 | 功能 |
|---|---|---|---|
| addValue | WantParams | String key, boolean value | 为WantParams添加"String"类型的key，"boolean"类型的值value。 |
| addValue | WantParams | String key, int value | 为WantParams添加"String"类型的key，"int"类型的值value。 |
| addValue | WantParams | String key, double value | 为WantParams添加"String"类型的key，"double"类型的值value。 |
| addValue | WantParams | String key, String value | 为WantParams添加"String"类型的key，"String"类型的值value。 |
| addValue | WantParams | String key, boolean[] value | 为WantParams添加"String"类型的key，"boolean[]"类型的值value。 |
| addValue | WantParams | String key, int[] value | 为WantParams添加"String"类型的key，"int[]"类型的值value。 |
| addValue | WantParams | String key, double[] value | 为WantParams添加"String"类型的key，"double[]"类型的值value。 |
| addValue | WantParams | String key, String[] value | 为WantParams添加"String"类型的key，"String[]"类型的值value。 |
| addValue | WantParams | String key, WantParams value | 为WantParams添加"String"类型的key，"WantParams"类型的值value。 |
| getValue | Object | String key | 获取键值为key的属性值，如果键值不存在则返回null。 |
| toWantParamsString | String | - | 将WantParams对象转换为Json字符串。 |
注意事项
- addValue和getValue中的key不能包含特殊字符；如\t、\r、\n等。
- 在使用手动方式(非WantParams)自定义字符串时，key和value均不能包含特殊字符。
- array和object不支持使用手动方式进行使用。
- double的小数点后有效小数位为6位。
用启动Ability的方式拉起原生Activity
每一个Ability对应一个StageActivity，启动Ability实际是拉起对应的StageActivity。
所以将原生Activity按照上文中Ability对应StageActivity的规则命名，可以用启动Ability的方式拉起原生Activity。
// xxx.etslet want: Want = {bundleName: 'com.example.helloworld',moduleName: 'entry', //小写abilityName: 'Jump', //首字母大写parameters:{id:1,name:'ArkUI-X'} //可选参数};let context = getContext(this) as common.UIAbilityContext;context.startAbility(want, (err, data) => {});
// xxx.java
public class EntryJumpActivity extends AppCompatActivity { //命名：moduleName + abilityName + “Activity”private static final String WANT_PARAMS = "params";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_jump);Intent intent = getIntent();String params = "";if (intent != null) {params = intent.getStringExtra(WANT_PARAMS);}}
}
