Fragment, Activity传值的注解组件

来源：互联网发布：李鹤年书法知乎编辑：程序博客网时间：2024/06/18 17:33

都是编译时注解，而没有采用反射，不用担心性能问题

IntentBuilder

@IntentBuilderclass DetailActivity extends Activity {    @Extra    String id;    @Extra @Nullable    String title;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        DetailActivityIntentBuilder.inject(getIntent(), this);        // TODO use id and title    }startActivity(new DetailActivityIntentBuilder("12345")    .title("MyTitle")    .build(context))}

@IntentBuilderclass DownloadService extends IntentService {    @Extra    String downloadUrl;    @Override    protected void onHandleIntent(Intent intent) {        MyServiceIntentBuilder.inject(intent, this);    }}startService(new DownloadServiceIntentBuilder("http://google.com").build(context))

OnActivityResult

@Overrideprotected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {    super.onActivityResult(requestCode, resultCode, data);    ActivityResult.onResult(requestCode, resultCode, data).into(this);}

@OnActivityResult(requestCode = 33)void onActivityResultTestActivity() { /* Do something */ }@OnActivityResult(requestCode = 1, resultCodes = { Activity.RESULT_OK })void onActivityResultActivityOk() { /* Only do something when ok */ }@OnActivityResult(requestCode = 1, resultCodes = { Activity.RESULT_CANCELED })void onActivityResultActivityCanceled() { /* Only do something when canceled */ }@OnActivityResult(requestCode = 2)void onActivityResultPickImage(final int resultCode, final Intent intent) { /* Do something */ }

支持各种参数

none
int
Intent
int, Intent
Intent, int
每个注解的方法只能有一个int和/或意图变量

FragmentArgs

@FragmentWithArgspublic class MyOptionalFragment extends Fragment {    @Arg    int id;    @Arg    String title;    @Arg(required = false)     String additionalText;    @Arg(required = false)    float factor;    @Arg(required = false)    int mFeatureId;    @Override    public void onCreate(Bundle savedInstanceState){        super.onCreate(savedInstanceState);        FragmentArgs.inject(this); // read @Arg fields    }}

public class MyActivity extends Activity {    public void onCreate(Bundle savedInstanceState){        super.onCreate(savedInstanceState);        int id = 123;        String title = "test";        // Using the generated Builder        Fragment fragment =             new MyFragmentBuilder(id, title) // required args            .additionalText("foo")     // Optional arg            .factor(1.2f)            // Optional arg            .featureId(42)            // Optional arg            .build();        // Fragment Transaction        getFragmentManager()            .beginTransaction()            .replace(R.id.container, fragment)            .commit();    }}

文／youmu178（简书作者）
原文链接：http://www.jianshu.com/p/d57c8ce3d1e5
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