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54 changes: 54 additions & 0 deletions
54
app/src/main/java/com/blankj/androidutilcode/activities/HandlerActivity.java
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| @@ -0,0 +1,54 @@ | ||
| package com.blankj.androidutilcode.activities; | ||
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| import android.app.Activity; | ||
| import android.os.Bundle; | ||
| import android.os.Message; | ||
| import android.view.View; | ||
| import android.widget.TextView; | ||
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| import com.blankj.androidutilcode.R; | ||
| import com.blankj.utilcode.utils.DeviceUtils; | ||
| import com.blankj.utilcode.utils.HandlerUtils; | ||
| import com.blankj.utilcode.utils.LogUtils; | ||
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| /** | ||
| * <pre> | ||
| * author: Blankj | ||
| * blog : http://blankj.com | ||
| * time : 2016/9/27 | ||
| * desc : Device工具类测试 | ||
| * </pre> | ||
| */ | ||
| public class HandlerActivity extends Activity | ||
| implements View.OnClickListener, HandlerUtils.OnReceiveMessageListener { | ||
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| private TextView tvAboutHandler0; | ||
| private TextView tvAboutHandler1; | ||
| HandlerUtils.HandlerHolder handlerHolder; | ||
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| @Override | ||
| protected void onCreate(Bundle savedInstanceState) { | ||
| super.onCreate(savedInstanceState); | ||
| setContentView(R.layout.activity_handler); | ||
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| tvAboutHandler0 = (TextView) findViewById(R.id.tv_about_handler0); | ||
| tvAboutHandler1 = (TextView) findViewById(R.id.tv_about_handler1); | ||
| findViewById(R.id.btn_send_msg_after_3s).setOnClickListener(this); | ||
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| handlerHolder = new HandlerUtils.HandlerHolder(this); | ||
| } | ||
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| @Override | ||
| public void onClick(View view) { | ||
| switch (view.getId()) { | ||
| case R.id.btn_send_msg_after_3s: | ||
| handlerHolder.sendEmptyMessageDelayed(0, 30000); | ||
| break; | ||
| } | ||
| } | ||
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| @Override | ||
| public void handlerMessage(Message msg) { | ||
| tvAboutHandler1.setText("get_msg_after_3s"); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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@@ -36,6 +36,5 @@ | |
| android:gravity="center" | ||
| /> | ||
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| </LinearLayout> | ||
| </ScrollView> | ||
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| @@ -0,0 +1,40 @@ | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
| <ScrollView | ||
| xmlns:android="http://schemas.android.com/apk/res/android" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="match_parent"> | ||
| <LinearLayout | ||
| android:layout_width="match_parent" | ||
| android:layout_height="wrap_content" | ||
| android:gravity="center_horizontal" | ||
| android:orientation="vertical" | ||
| android:padding="@dimen/spacing_small"> | ||
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| <Button | ||
| android:id="@+id/btn_send_msg_after_3s" | ||
| style="@style/BtnFont" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="wrap_content" | ||
| android:text="@string/handler.send_msg_after_3s" | ||
| /> | ||
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| <TextView | ||
| android:id="@+id/tv_about_handler0" | ||
| style="@style/Font" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="wrap_content" | ||
| android:gravity="center" | ||
| /> | ||
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| <TextView | ||
| android:id="@+id/tv_about_handler1" | ||
| style="@style/Font" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="wrap_content" | ||
| android:gravity="center" | ||
| /> | ||
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| </LinearLayout> | ||
| </ScrollView> |
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43 changes: 43 additions & 0 deletions
43
utilcode/src/main/java/com/blankj/utilcode/utils/HandlerUtils.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,43 @@ | ||
| package com.blankj.utilcode.utils; | ||
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| import android.os.Handler; | ||
| import android.os.Message; | ||
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| import java.lang.ref.WeakReference; | ||
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| /** | ||
| * <pre> | ||
| * author: Blankj | ||
| * blog : http://blankj.com | ||
| * time : 16/11/01 | ||
| * desc : Handler相关工具类 | ||
| * </pre> | ||
| */ | ||
| public class HandlerUtils { | ||
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| private HandlerUtils() { | ||
| throw new UnsupportedOperationException("u can't instantiate me..."); | ||
| } | ||
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| public static class HandlerHolder extends Handler { | ||
| WeakReference<OnReceiveMessageListener> mListenerWeakReference; | ||
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| /** | ||
| * @param listener 必读：推荐在Activity或者Activity内部持有类中实现该接口，不要使用匿名类，可能会被GC | ||
| */ | ||
| public HandlerHolder(OnReceiveMessageListener listener) { | ||
| mListenerWeakReference = new WeakReference<>(listener); | ||
| } | ||
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| @Override | ||
| public void handleMessage(Message msg) { | ||
| if (mListenerWeakReference != null && mListenerWeakReference.get() != null) { | ||
| mListenerWeakReference.get().handlerMessage(msg); | ||
| } | ||
| } | ||
| } | ||
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| public interface OnReceiveMessageListener { | ||
| void handlerMessage(Message msg); | ||
| } | ||
| } |
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