輕量級安卓架構源碼，安卓源碼

輕量級安卓架構源碼，安卓源碼

上代碼   自己的Activity   package com.young.android;import com.young.android.annotation.ViewInject;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends YoungActivity {@ViewInject(id = R.id.tv)private TextView textView;@ViewInject(id = R.id.but)private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);textView.setText("yong   inject");button.setText("註解but");button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "注入", 1).show();}});}}

<pre name="code" class="html">布局 代碼 <LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">        <TextView         android:layout_width="fill_parent"        android:textSize="20sp"        android:layout_height="wrap_content"        android:id="@+id/tv"/>         <Button         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/but"/>     </LinearLayout>

父Activitypackage com.young.android;import java.lang.reflect.Field;import com.young.android.annotation.ViewInject;import com.young.android.exception.IllegalParameterException;import android.app.Activity;import android.view.View;public class YoungActivity extends Activity {@Overridepublic void setContentView(int layoutResID) {// TODO Auto-generated method stubsuper.setContentView(layoutResID);Class<? extends YoungActivity> clz = getClass();Field[] fs = clz.getDeclaredFields();for (Field f : fs) {ViewInject viewInject = f.getAnnotation(ViewInject.class);if (viewInject != null) {int id = viewInject.id();View v = findViewById(id);if (v == null)throw new IllegalParameterException("@ViewInject 參數不合法，你應該這樣使用    例：首先在對應的布局檔案中定義TextView，id為tv,然後在聲明的TextView前標註  @ViewInject(id=R.id.tv)");f.setAccessible(true);try {f.set(YoungActivity.this, v);} catch (IllegalAccessException e) {// TODO Auto-generated catch block//e.printStackTrace();throw new IllegalParameterException("@ViewInject 參數不合法，你應該這樣使用    例：首先在對應的布局檔案中定義TextView，id為tv,然後在聲明的TextView前標註  @ViewInject(id=R.id.tv)");} catch (IllegalArgumentException e) {// TODO Auto-generated catch block//e.printStackTrace();throw new IllegalParameterException("@ViewInject 參數不合法，你應該這樣使用    例：首先在對應的布局檔案中定義TextView，id為tv,然後在聲明的TextView前標註  @ViewInject(id=R.id.tv)");}f.setAccessible(false);}}}}

註解定義 package com.young.android.annotation;import java.lang.annotation.ElementType;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;@Target(ElementType.FIELD )@Retention(RetentionPolicy.RUNTIME)public @interface ViewInject {public int id() default 0; }

異常package com.young.android.exception;public class IllegalParameterException extends RuntimeException{ private static final long serialVersionUID = 839888641617782091L; public IllegalParameterException(String detailMessage) {super(detailMessage);// TODO Auto-generated constructor stub} }