本文介绍了Android应用程序强制关闭 - setOnClickListener [简单的应用程序] [新手]的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

程序功能正常就开始了。当按钮被点击,应用程序强制关闭和日志猫(底部)所示。

XML文件 - 布局是全功能的

 < LinearLayout中的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
的xmlns:工具=htt​​p://schemas.android.com/tool​​s
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:方向=垂直
机器人:paddingBottom会=@扪/ activity_vertical_margin
机器人:paddingLeft =@扪/ activity_horizo​​ntal_margin
机器人:paddingRight =@扪/ activity_horizo​​ntal_margin
机器人:paddingTop =@扪/ activity_vertical_margin
工具:上下文=$ com.example.figurehowtodo.MainActivity PlaceholderFragment><的TextView
    机器人:ID =@ + ID / produceText1
    机器人:layout_width =WRAP_CONTENT
    机器人:layout_height =WRAP_CONTENT
    机器人:文字=@字符串/参考hello world/><按钮
    机器人:ID =@ + ID / myactualbutton
    机器人:layout_width =match_parent
    机器人:layout_height =WRAP_CONTENT
    机器人:文字=ClickMe/>< / LinearLayout中>

MainActivity.java文件

 包com.example.figurehowtodo;进口android.app.Activity;
进口android.os.Bundle;
进口android.widget.Button;
进口android.widget.TextView;公共类MainActivity延伸活动{按钮myButton的;
TextView的tvView;保护无效的onCreate(捆绑savedInstanceState){
    super.onCreate(savedInstanceState);
    的setContentView(R.layout.fragment_main);
    则myButton =(按钮)findViewById(R.id.myactualbutton);
    tvView =(的TextView)findViewById(R.id.produceText1);
    mybutton.setOnClickListener(新MyOwnOnClickListener());}
}

MyOwnOnClickListener.java

 包com.example.figurehowtodo;进口android.app.Activity;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.TextView;公共类MyOwnOnClickListener扩展活动实现OnClickListener {
// INT ID;
TextView的ID2;
// TextView的ID3;/ * MainActivity来电者;
公共MyOwnOnClickListener(){
    加成();
    忽略此位
} * /公共无效的onClick(视图v){
    添加(五);
}公共无效添加(视图v){
    // ID = hello.getId();
    ID2 =(的TextView)findViewById(R.id.produceText1);    id2.setText(fgdsgdfhgdfh);
}}

logcat的LOG

  20 03-27:56:23.831:D / AndroidRuntime(2109):>>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit<<<<<<
        03-27 20:56:23.831:D / AndroidRuntime(2109):CheckJNI为ON
        03-27 20:56:24.280:D / AndroidRuntime(2109):在主入口com.android.commands.pm.Pm
        03-27 20:56:24.390:D / dalvikvm(299):GC_EXPLICIT释放4K,54%免费2545K / 5511K,1625K外部/ 2137K,暂停51ms
        03-27 20:56:24.390:W / ActivityManager(61):没有内容提供商发现:
        03-27 20:56:24.491:W / ActivityManager(61):没有内容提供商发现:
        03-27 20:56:24.500:D / PackageParser(61):扫描包:/data/app/vmdl58109320.tmp
        03-27 20:56:24.810:D / dalvikvm(61):GC_CONCURRENT释放1447K,46%免费5086K / 9287K,3520K外部/ 4385K,暂停为5ms + 6ms的
        03-27 20:56:25.020:D / dalvikvm(61):GC_FOR_MALLOC释放691K,47%免费4979K / 9287K,3511K外部/ 4385K,暂停的55ms
        03-27 20:56:25.200:D / dalvikvm(61):GC_FOR_MALLOC释放634K,47%免费4982K / 9287K,3511K外部/ 4385K,暂停56MS
        03-27 20:56:25.381:D / dalvikvm(61):GC_FOR_MALLOC释放632K,47%免费4985K / 9287K,3511K外部/ 4385K,暂停54ms
        03-27 20:56:25.560:D / dalvikvm(61):GC_FOR_MALLOC释放633K,47%免费4990K / 9287K,3511K外部/ 4385K,暂停54ms
        03-27 20:56:25.700:I /软件包管理系统(61):删除非系统包:com.example.figurehowtodo
        03-27 20:56:25.700:I / ActivityManager(61):强制停止包com.example.figurehowtodo的ui​​d = 10037
        03-27 20:56:25.760:D /软件包管理系统(61):扫描包com.example.figurehowtodo
        03-27 20:56:25.770:I /软件包管理系统(61):包com.example.figurehowtodo codePATH从/data/app/com.example.figurehowtodo-1.apk改为/数据/应用/ COM。 example.figurehowtodo-2.apk;保存数据,并使用新
        03-27 20:56:25.770:I /软件包管理系统(61):拆包/data/app/com.example.figurehowtodo-2.apk本地库
        03-27 20:56:25.800:D / INSTALLD(35):DexInv:--- BEGIN/data/app/com.example.figurehowtodo-2.apk'---
        03-27 20:56:26.620:D / dalvikvm(2118):DexOpt:找不到场Landroid /图形/ BitmapFactory $选项; .inMutable
        03-27 20:56:26.861:D / dalvikvm(2118):DexOpt:找不到静态字段
        03-27 20:56:27.330:D / dalvikvm(2118):DexOpt:负载260ms,验证+选择850ms
        03-27 20:56:27.380:D / INSTALLD(35):DexInv:--- END/data/app/com.example.figurehowtodo-2.apk(成功)---
        03-27 20:56:27.380:W /软件包管理系统(61):为PKG code路线:从com.example.figurehowtodo改变/data/app/com.example.figurehowtodo-1.apk到/数据/应用/com.example.figurehowtodo-2.apk
        03-27 20:56:27.380:W /软件包管理系统(61):为PKG资源路径:从com.example.figurehowtodo改变/data/app/com.example.figurehowtodo-1.apk到/数据/应用/ COM。 example.figurehowtodo-2.apk
        03-27 20:56:27.380:D /软件包管理系统(61):活动:com.example.figurehowtodo.MainActivity
        03-27 20:56:27.400:I / ActivityManager(61):强制停止包com.example.figurehowtodo的ui​​d = 10037
        03-27 20:56:27.470:I / INSTALLD(35):移动/data/dalvik-cache/data@[email protected]@classes.dex - > /data/dalvik-cache/data@[email protected]@classes.dex
        03-27 20:56:27.470:安装在/data/app/com.example.figurehowtodo-2.apk新包装:D /软件包管理系统(61)
        03-27 20:56:27.560:I / ActivityManager(61):强制停止包com.example.figurehowtodo的ui​​d = 10037
        03-27 20:56:27.620:D / dalvikvm(134):GC_EXPLICIT释放101K,50%的自由2951K / 5895K,5981K外部/ 7371K,暂停54ms
        03-27 20:56:27.700:D / dalvikvm(177):GC_EXPLICIT释放97K,52%免费2759K / 5639K,1625K外部/ 2137K,暂停73ms
        03-27 20:56:27.770:W / RecognitionManagerService(61):发现没有可用的语音识别服务
        03-27 20:56:28.080:D / dalvikvm(61):GC_EXPLICIT释放573K,46%免费5081K / 9287K,3511K外部/ 4385K,暂停96ms
        03-27 20:56:28.120:I / INSTALLD(35):断开链接/data/dalvik-cache/data@[email protected]@classes.dex
        03-27 20:56:28.120:D / AndroidRuntime(2109):关闭VM
        03-27 20:56:28.141:D / dalvikvm(2109):GC_CONCURRENT释放101K,72%的免费295K / 1024K,外部0K / 0K,暂停1毫秒+ 1毫秒
        03-27 20:56:28.141:D / JDWP(2109):GOT唤醒信号,选择的拯救
        03-27 20:56:28.141:D / dalvikvm(2109):调试器脱落;对象注册了1项
        03-27 20:56:28.470:D / AndroidRuntime(2124):GT;>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit<<<<<<
        03-27 20:56:28.470:D / AndroidRuntime(2124):CheckJNI为ON
        03-27 20:56:28.920:D / AndroidRuntime(2124):在主入口com.android.commands.am.Am
        03-27 20:56:28.940:I / ActivityManager(61):开始:意向{行动= android.intent.action.MAIN猫= [android.intent.category.LAUNCHER] FLG = 0x10000000的CMP = com.example.figurehowtodo /.MainActivity}从PID 2124
        03-27 20:56:29.111:D / AndroidRuntime(2124):关闭VM
        03-27 20:56:29.111:I / ActivityManager(61):启动PROC com.example.figurehowtodo的活动com.example.figurehowtodo / .MainActivity:PID = 2132 UID = 10037导报= {}
        03-27 20:56:29.130:D / dalvikvm(2124):GC_CONCURRENT释放102K,69%免费320K / 1024K,外部0K / 0K,暂停1毫秒+ 1毫秒
        03-27 20:56:29.140:D / JDWP(2124):GOT唤醒信号,选择的拯救
        03-27 20:56:29.140:D / dalvikvm(2124):调试器脱落;对象注册了1项
        03-27 20:56:29.180:I / dalvikvm(2124):JNI:AttachCurrentThread(从??? ???)。
        03-27 20:56:29.180:I / AndroidRuntime(2124):注:连接线的捆扎线#3'失败
        03-27 20:56:29.930:D / dalvikvm(115):GREF已增加至201
        03-27 20:56:30.000:I / ActivityManager(61):显示com.example.figurehowtodo / .MainActivity:+ 897ms
        03-27 20:56:31.690:D / AndroidRuntime(2132):关闭VM
        03-27 20:56:31.690:W / dalvikvm(2132):主题ID = 1:螺纹未捕获的异常(组= 0x40015560)退出

----------错误就从这里开始-------错误就从这里开始-------错误就从这里开始-------

  20 03-27:56:31.710:E / AndroidRuntime(2132):致命异常:主要
        03-27 20:56:31.710:E / AndroidRuntime(2132):显示java.lang.NullPointerException
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.app.Activity.findViewById(Activity.java:1647)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在com.example.figurehowtodo.MyOwnOnClickListener.addiTion(MyOwnOnClickListener.java:29)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在com.example.figurehowtodo.MyOwnOnClickListener.onClick(MyOwnOnClickListener.java:22)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.view.View.performClick(View.java:2485)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.view.View $ PerformClick.run(View.java:9080)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.os.Handler.handleCallback(Handler.java:587)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.os.Handler.dispatchMessage(Handler.java:92)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.os.Looper.loop(Looper.java:123)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在android.app.ActivityThread.main(ActivityThread.java:3683)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在java.lang.reflect.Method.invokeNative(本机方法)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在java.lang.reflect.Method.invoke(Method.java:507)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
        03-27 20:56:31.710:E / AndroidRuntime(2132):在dalvik.system.NativeStart.main(本机方法)
        03-27 20:56:31.720:W / ActivityManager(61):强制完成活动com.example.figurehowtodo / .MainActivity
        03-27 20:56:32.230:W / ActivityManager(61):活动暂停超时HistoryRecord {40698748 com.example.figurehowtodo / .MainActivity}
        03-27 20:56:38.440:D / dalvikvm(299):GC_EXPLICIT释放6K,54%免费2544K / 5511K,1625K外部/ 2137K,暂停的55ms
        03-27 20:56:43.380:W / ActivityManager(61):活动破坏超时HistoryRecord {40698748 com.example.figurehowtodo / .MainActivity}
        03-27 20:56:43.480:D / dalvikvm(311):GC_EXPLICIT释放2K,54%免费2537K / 5511K,1625K外部/ 2137K,暂停78ms
        03-27 20:56:48.460:D / dalvikvm(220):GC_EXPLICIT释放184K,54%免费2764K / 5959K,2202K外部/ 2671K,暂停56MS


解决方案

您还没有设置您的内容查看您的活动类 MyOwnOnClickListener 。所以方法 findViewById()找不到你传递作为参数的看法。

我觉得 MyOwnOnClickListener 类不应该是一个活动类,而只是一个倾听者。你可以传递到的TextView A参考监听器来使用它。

或者你可以实现你的 MainActivity 类和SUP preSS的 MyOwnOnClickListener 类。

 公共类MainActivity扩展活动实现OnClickListener {
    按钮myButton的;
    TextView的tvView;    保护无效的onCreate(捆绑savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.fragment_main);
        则myButton =(按钮)findViewById(R.id.myactualbutton);
        tvView =(的TextView)findViewById(R.id.produceText1);
        mybutton.setOnClickListener(本);
    }    公共无效的onClick(视图v){
        添加(五);
    }    公共无效添加(视图v){
        tvView.setText(fgdsgdfhgdfh);
    }
}

编辑:如果你想使用一个监听器类,只是保持你的 MainActivity ,因为它是只改变调用 MyOwnOnClickListener 来传递 tvView 参考,并修改 MyOwnOnClickListener 类是这样的:

 公共类MyOwnOnClickListener实现OnClickListener {
TextView的ID2;    // MainActivity呼叫者;
    公共MyOwnOnClickListener(ID2的TextView){
        this.id2 = ID2;
    }    公共无效的onClick(视图v){
        开关(v.getId()){
        案例R.id.produceText1:
            id2.setText(fgdsgdfhgdfh);
            打破;
        //这里的其他情形...
        默认:
            //无论你要管理的情况......
        }
    }
}

它应该工作...

Program functions as normal on start up. As soon as button is clicked, app force closes and the log cat (at bottom) is shown.

XML File - layout is fully functional

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.figurehowtodo.MainActivity$PlaceholderFragment" >

<TextView
    android:id="@+id/produceText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world" />

<Button
    android:id="@+id/myactualbutton"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="ClickMe" />

</LinearLayout>

MainActivity.java file

package com.example.figurehowtodo;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {

Button mybutton;
TextView tvView;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_main);
    mybutton = (Button) findViewById(R.id.myactualbutton);
    tvView = (TextView) findViewById(R.id.produceText1);
    mybutton.setOnClickListener(new MyOwnOnClickListener());



}


}

MyOwnOnClickListener.java

package com.example.figurehowtodo;

import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class MyOwnOnClickListener extends Activity implements OnClickListener{
//int id;
TextView id2;
//TextView id3;

/* MainActivity caller;
public MyOwnOnClickListener() {
    addiTion();
    IGNORE THIS BIT
} */



public void onClick(View v) {
    addiTion(v);


}

public void addiTion(View v){
    //id = hello.getId();
    id2 = (TextView) findViewById(R.id.produceText1);

    id2.setText("fgdsgdfhgdfh");
}

}

LOGCAT LOG

        03-27 20:56:23.831: D/AndroidRuntime(2109): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
        03-27 20:56:23.831: D/AndroidRuntime(2109): CheckJNI is ON
        03-27 20:56:24.280: D/AndroidRuntime(2109): Calling main entry com.android.commands.pm.Pm
        03-27 20:56:24.390: D/dalvikvm(299): GC_EXPLICIT freed 4K, 54% free 2545K/5511K, external 1625K/2137K, paused 51ms
        03-27 20:56:24.390: W/ActivityManager(61): No content provider found for:
        03-27 20:56:24.491: W/ActivityManager(61): No content provider found for:
        03-27 20:56:24.500: D/PackageParser(61): Scanning package: /data/app/vmdl58109320.tmp
        03-27 20:56:24.810: D/dalvikvm(61): GC_CONCURRENT freed 1447K, 46% free 5086K/9287K, external 3520K/4385K, paused 5ms+6ms
        03-27 20:56:25.020: D/dalvikvm(61): GC_FOR_MALLOC freed 691K, 47% free 4979K/9287K, external 3511K/4385K, paused 55ms
        03-27 20:56:25.200: D/dalvikvm(61): GC_FOR_MALLOC freed 634K, 47% free 4982K/9287K, external 3511K/4385K, paused 56ms
        03-27 20:56:25.381: D/dalvikvm(61): GC_FOR_MALLOC freed 632K, 47% free 4985K/9287K, external 3511K/4385K, paused 54ms
        03-27 20:56:25.560: D/dalvikvm(61): GC_FOR_MALLOC freed 633K, 47% free 4990K/9287K, external 3511K/4385K, paused 54ms
        03-27 20:56:25.700: I/PackageManager(61): Removing non-system package:com.example.figurehowtodo
        03-27 20:56:25.700: I/ActivityManager(61): Force stopping package com.example.figurehowtodo uid=10037
        03-27 20:56:25.760: D/PackageManager(61): Scanning package com.example.figurehowtodo
        03-27 20:56:25.770: I/PackageManager(61): Package com.example.figurehowtodo codePath changed from /data/app/com.example.figurehowtodo-1.apk to /data/app/com.example.figurehowtodo-2.apk; Retaining data and using new
        03-27 20:56:25.770: I/PackageManager(61): Unpacking native libraries for /data/app/com.example.figurehowtodo-2.apk
        03-27 20:56:25.800: D/installd(35): DexInv: --- BEGIN '/data/app/com.example.figurehowtodo-2.apk' ---
        03-27 20:56:26.620: D/dalvikvm(2118): DexOpt: couldn't find field Landroid/graphics/BitmapFactory$Options;.inMutable
        03-27 20:56:26.861: D/dalvikvm(2118): DexOpt: couldn't find static field
        03-27 20:56:27.330: D/dalvikvm(2118): DexOpt: load 260ms, verify+opt 850ms
        03-27 20:56:27.380: D/installd(35): DexInv: --- END '/data/app/com.example.figurehowtodo-2.apk' (success) ---
        03-27 20:56:27.380: W/PackageManager(61): Code path for pkg : com.example.figurehowtodo changing from /data/app/com.example.figurehowtodo-1.apk to /data/app/com.example.figurehowtodo-2.apk
        03-27 20:56:27.380: W/PackageManager(61): Resource path for pkg : com.example.figurehowtodo changing from /data/app/com.example.figurehowtodo-1.apk to /data/app/com.example.figurehowtodo-2.apk
        03-27 20:56:27.380: D/PackageManager(61):   Activities: com.example.figurehowtodo.MainActivity
        03-27 20:56:27.400: I/ActivityManager(61): Force stopping package com.example.figurehowtodo uid=10037
        03-27 20:56:27.470: I/installd(35): move /data/dalvik-cache/data@[email protected]@classes.dex -> /data/dalvik-cache/data@[email protected]@classes.dex
        03-27 20:56:27.470: D/PackageManager(61): New package installed in /data/app/com.example.figurehowtodo-2.apk
        03-27 20:56:27.560: I/ActivityManager(61): Force stopping package com.example.figurehowtodo uid=10037
        03-27 20:56:27.620: D/dalvikvm(134): GC_EXPLICIT freed 101K, 50% free 2951K/5895K, external 5981K/7371K, paused 54ms
        03-27 20:56:27.700: D/dalvikvm(177): GC_EXPLICIT freed 97K, 52% free 2759K/5639K, external 1625K/2137K, paused 73ms
        03-27 20:56:27.770: W/RecognitionManagerService(61): no available voice recognition services found
        03-27 20:56:28.080: D/dalvikvm(61): GC_EXPLICIT freed 573K, 46% free 5081K/9287K, external 3511K/4385K, paused 96ms
        03-27 20:56:28.120: I/installd(35): unlink /data/dalvik-cache/data@[email protected]@classes.dex
        03-27 20:56:28.120: D/AndroidRuntime(2109): Shutting down VM
        03-27 20:56:28.141: D/dalvikvm(2109): GC_CONCURRENT freed 101K, 72% free 295K/1024K, external 0K/0K, paused 1ms+1ms
        03-27 20:56:28.141: D/jdwp(2109): Got wake-up signal, bailing out of select
        03-27 20:56:28.141: D/dalvikvm(2109): Debugger has detached; object registry had 1 entries
        03-27 20:56:28.470: D/AndroidRuntime(2124): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
        03-27 20:56:28.470: D/AndroidRuntime(2124): CheckJNI is ON
        03-27 20:56:28.920: D/AndroidRuntime(2124): Calling main entry com.android.commands.am.Am
        03-27 20:56:28.940: I/ActivityManager(61): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.figurehowtodo/.MainActivity } from pid 2124
        03-27 20:56:29.111: D/AndroidRuntime(2124): Shutting down VM
        03-27 20:56:29.111: I/ActivityManager(61): Start proc com.example.figurehowtodo for activity com.example.figurehowtodo/.MainActivity: pid=2132 uid=10037 gids={}
        03-27 20:56:29.130: D/dalvikvm(2124): GC_CONCURRENT freed 102K, 69% free 320K/1024K, external 0K/0K, paused 1ms+1ms
        03-27 20:56:29.140: D/jdwp(2124): Got wake-up signal, bailing out of select
        03-27 20:56:29.140: D/dalvikvm(2124): Debugger has detached; object registry had 1 entries
        03-27 20:56:29.180: I/dalvikvm(2124): JNI: AttachCurrentThread (from ???.???)
        03-27 20:56:29.180: I/AndroidRuntime(2124): NOTE: attach of thread 'Binder Thread #3' failed
        03-27 20:56:29.930: D/dalvikvm(115): GREF has increased to 201
        03-27 20:56:30.000: I/ActivityManager(61): Displayed com.example.figurehowtodo/.MainActivity: +897ms
        03-27 20:56:31.690: D/AndroidRuntime(2132): Shutting down VM
        03-27 20:56:31.690: W/dalvikvm(2132): threadid=1: thread exiting with uncaught exception (group=0x40015560)

----------ERROR BEGINS HERE-------ERROR BEGINS HERE------- ERROR BEGINS HERE-------

        03-27 20:56:31.710: E/AndroidRuntime(2132): FATAL EXCEPTION: main
        03-27 20:56:31.710: E/AndroidRuntime(2132): java.lang.NullPointerException
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.app.Activity.findViewById(Activity.java:1647)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at com.example.figurehowtodo.MyOwnOnClickListener.addiTion(MyOwnOnClickListener.java:29)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at com.example.figurehowtodo.MyOwnOnClickListener.onClick(MyOwnOnClickListener.java:22)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.view.View.performClick(View.java:2485)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.view.View$PerformClick.run(View.java:9080)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.os.Handler.handleCallback(Handler.java:587)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.os.Handler.dispatchMessage(Handler.java:92)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.os.Looper.loop(Looper.java:123)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at android.app.ActivityThread.main(ActivityThread.java:3683)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at java.lang.reflect.Method.invokeNative(Native Method)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at java.lang.reflect.Method.invoke(Method.java:507)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
        03-27 20:56:31.710: E/AndroidRuntime(2132):     at dalvik.system.NativeStart.main(Native Method)
        03-27 20:56:31.720: W/ActivityManager(61):   Force finishing activity com.example.figurehowtodo/.MainActivity
        03-27 20:56:32.230: W/ActivityManager(61): Activity pause timeout for HistoryRecord{40698748 com.example.figurehowtodo/.MainActivity}
        03-27 20:56:38.440: D/dalvikvm(299): GC_EXPLICIT freed 6K, 54% free 2544K/5511K, external 1625K/2137K, paused 55ms
        03-27 20:56:43.380: W/ActivityManager(61): Activity destroy timeout for HistoryRecord{40698748 com.example.figurehowtodo/.MainActivity}
        03-27 20:56:43.480: D/dalvikvm(311): GC_EXPLICIT freed 2K, 54% free 2537K/5511K, external 1625K/2137K, paused 78ms
        03-27 20:56:48.460: D/dalvikvm(220): GC_EXPLICIT freed 184K, 54% free 2764K/5959K, external 2202K/2671K, paused 56ms
解决方案

You have not set you content view for your activity class MyOwnOnClickListener. So method findViewById() cannot find the view you are passing as argument.

I think the MyOwnOnClickListener class shouldn't be an Activity class, but just a listener. You can pass a reference to the TextView to the listener to use it.

Or you can implement the listener in your MainActivity class and suppress the MyOwnOnClickListener class.

public class MainActivity extends Activity implements OnClickListener {
    Button mybutton;
    TextView tvView;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_main);
        mybutton = (Button) findViewById(R.id.myactualbutton);
        tvView = (TextView) findViewById(R.id.produceText1);
        mybutton.setOnClickListener(this);
    }

    public void onClick(View v) {
        addiTion(v);
    }

    public void addiTion(View v){
        tvView.setText("fgdsgdfhgdfh");
    }
}

EDIT: If you want to use a listener class, just keep your MainActivity as it is, change only the call to the MyOwnOnClickListener to pass the tvView reference, and change the MyOwnOnClickListener class like this:

public class MyOwnOnClickListener implements OnClickListener{
TextView id2;

    // MainActivity caller;
    public MyOwnOnClickListener(TextView id2) {
        this.id2 = id2;
    }

    public void onClick(View v) {
        switch(v.getId()) {
        case R.id.produceText1:
            id2.setText("fgdsgdfhgdfh");
            break;
        // Other cases here...
        default:
            // Whatever you want to manage the situation...
        }
    }
}

It should work...

这篇关于Android应用程序强制关闭 - setOnClickListener [简单的应用程序] [新手]的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-03 17:52