浏览量: 442

内容隐藏目录

1) 前言

3.2) 新建MyUncaughtExceptionHandler.java

3.3) 新建UncaughtExceptionActivity.java

3.4) 新建MyApplication.java

3.5) 修改配置文件

前言

开发安卓的小伙伴都遇到过APP突然崩溃,无响应的情况.如果发生在自己手中,那么还可以通过IDE查看错误日志,但是实际都是发生在用户手中,那么这个时候产生崩溃,无响应ANR异常就很麻烦.无从下手.因此,需要全局异常捕获.也就是对未知异常,程序员没有处理的异常进行处理,记录等便于分析查找原因，而一个美观的崩溃提示则可以大大加分。

效果展示

源码

新建MyUncaughtExceptionHandler.java

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.Locale;

/**
 * @ClassName MyUncaughtExceptionHandler
 * @Description 全局捕捉异常
 * @Author summerain0
 * @Date 2020/9/11 15:31
 */
public class MyUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
    // 单例
    private static MyUncaughtExceptionHandler myUncaughtExceptionHandler;
    // 上下文
    private Context context;
    // 会输出到文件中
    private StringBuilder stringBuilder;
    // 系统异常处理器
    private Thread.UncaughtExceptionHandler defaultUncaughtExceptionHandler;

    public MyUncaughtExceptionHandler(Context context) {
        this.context = context;
    }

    // 获取单例
    public static synchronized MyUncaughtExceptionHandler getInstance(Context ctx) {
        if (myUncaughtExceptionHandler == null) {
            myUncaughtExceptionHandler = new MyUncaughtExceptionHandler(ctx);
        }
        return myUncaughtExceptionHandler;
    }

    // 初始化
    public void init() {
        defaultUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    @Override
    public void uncaughtException(Thread thread, Throwable throwable) {
        if (throwable == null) {
            defaultUncaughtExceptionHandler.uncaughtException(thread, throwable);
        }

        // 创建集合对象
        stringBuilder = new StringBuilder();

        // 记录时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss.SSS", Locale.getDefault());
        String date = simpleDateFormat.format(new Date());
        addMessage("崩溃时间", date);

        // 记录应用版本信息
        try {
            PackageManager pm = context.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);
            addMessage("版本名", pi.versionName);
            addMessage("版本号", pi.versionCode);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            addMessage("error", "记录版本信息失败！" + e.getMessage());
        }

        // 记录设备信息
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                Object obj = field.get(null);
                if (obj != null) {
                    addMessage(field.getName(), obj);
                }
            } catch (IllegalAccessException e) {
                e.printStackTrace();
                addMessage("error", "记录设备信息失败！" + e.getMessage());
            }
        }

        // 添加分隔符
        addMessage(null, "==============================================================");
        addMessage(null, "========================   崩溃日志   =========================");
        addMessage(null, "==============================================================");

        // 记录崩溃信息
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        throwable.printStackTrace(printWriter);
        Throwable cause = throwable.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        addMessage(null, writer.toString());

        // 生成路径，保存至/Android/data/包名，无需读写权限
        try {
            File root = context.getExternalFilesDir("log");
            String filename = date + ".log";
            File file = new File(root, filename);
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(stringBuilder.toString().getBytes());
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
            defaultUncaughtExceptionHandler.uncaughtException(thread, throwable);
        }

        // 启动崩溃异常页面
        Intent intent = new Intent(context, UncaughtExceptionActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 请勿修改，否则无法打开页面
        intent.putExtra("error", stringBuilder.toString());
        context.startActivity(intent);
        System.exit(1);// 请勿修改，否则无法打开页面

    }

    // 添加数据
    private void addMessage(String key, Object obj) {
        // 对数组做一下处理
        if (obj instanceof String[]) {
            String[] list = (String[]) obj;
            ArrayList<String> array = new ArrayList<>(Arrays.asList(list));
            stringBuilder.append(key).append("=").append(array.toString()).append("\n");
        }
        // 其他的都直接添加
        if (key == null) {
            stringBuilder.append(obj)
                    .append("\n");
        } else {
            stringBuilder.append(key)
                    .append("=")
                    .append(obj)
                    .append("\n");
        }
    }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

import android.content.Context;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.os.Build;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.io.Writer;

import java.lang.reflect.Field;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Date;

import java.util.Locale;

/**

* @ClassName MyUncaughtExceptionHandler

* @Description 全局捕捉异常

* @Author summerain0

* @Date 2020/9/11 15:31

public class MyUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {

// 单例

private static MyUncaughtExceptionHandler myUncaughtExceptionHandler;

// 上下文

private Context context;

// 会输出到文件中

private StringBuilder stringBuilder;

// 系统异常处理器

private Thread.UncaughtExceptionHandler defaultUncaughtExceptionHandler;

public MyUncaughtExceptionHandler(Context context) {

this.context = context;

}

// 获取单例

public static synchronized MyUncaughtExceptionHandler getInstance(Context ctx) {

if (myUncaughtExceptionHandler == null) {

myUncaughtExceptionHandler = new MyUncaughtExceptionHandler(ctx);

}

return myUncaughtExceptionHandler;

}

// 初始化

public void init() {

defaultUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();

Thread.setDefaultUncaughtExceptionHandler(this);

}

@Override

public void uncaughtException(Thread thread, Throwable throwable) {

if (throwable == null) {

defaultUncaughtExceptionHandler.uncaughtException(thread, throwable);

}

// 创建集合对象

stringBuilder = new StringBuilder();

// 记录时间

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss.SSS", Locale.getDefault());

String date = simpleDateFormat.format(new Date());

addMessage("崩溃时间", date);

// 记录应用版本信息

try {

PackageManager pm = context.getPackageManager();

PackageInfo pi = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);

addMessage("版本名", pi.versionName);

addMessage("版本号", pi.versionCode);

} catch (PackageManager.NameNotFoundException e) {

e.printStackTrace();

addMessage("error", "记录版本信息失败！" + e.getMessage());

}

// 记录设备信息

Field[] fields = Build.class.getDeclaredFields();

for (Field field : fields) {

try {

field.setAccessible(true);

Object obj = field.get(null);

if (obj != null) {

addMessage(field.getName(), obj);

}

} catch (IllegalAccessException e) {

e.printStackTrace();

addMessage("error", "记录设备信息失败！" + e.getMessage());

}

// 添加分隔符

addMessage(null, "==============================================================");

addMessage(null, "======================== 崩溃日志 =========================");

addMessage(null, "==============================================================");

// 记录崩溃信息

Writer writer = new StringWriter();

PrintWriter printWriter = new PrintWriter(writer);

throwable.printStackTrace(printWriter);

Throwable cause = throwable.getCause();

while (cause != null) {

cause.printStackTrace(printWriter);

cause = cause.getCause();

}

printWriter.close();

addMessage(null, writer.toString());

// 生成路径，保存至/Android/data/包名，无需读写权限

try {

File root = context.getExternalFilesDir("log");

String filename = date + ".log";

File file = new File(root, filename);

FileOutputStream fos = new FileOutputStream(file);

fos.write(stringBuilder.toString().getBytes());

fos.close();

} catch (IOException e) {

e.printStackTrace();

defaultUncaughtExceptionHandler.uncaughtException(thread, throwable);

}

// 启动崩溃异常页面

Intent intent = new Intent(context, UncaughtExceptionActivity.class);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 请勿修改，否则无法打开页面

intent.putExtra("error", stringBuilder.toString());

context.startActivity(intent);

System.exit(1);// 请勿修改，否则无法打开页面

}

// 添加数据

private void addMessage(String key, Object obj) {

// 对数组做一下处理

if (obj instanceof String[]) {

String[] list = (String[]) obj;

ArrayList<String> array = new ArrayList<>(Arrays.asList(list));

stringBuilder.append(key).append("=").append(array.toString()).append("\n");

}

// 其他的都直接添加

if (key == null) {

stringBuilder.append(obj)

.append("\n");

} else {

stringBuilder.append(key)

.append("=")

.append(obj)

.append("\n");

}

新建UncaughtExceptionActivity.java

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

/**
 * @ClassName UncaughtExceptionActivity
 * @Description 异常页面
 * @Author summerain0
 * @Date 2020/9/12 11:02
 */
public class UncaughtExceptionActivity extends AppCompatActivity {
    public static final String TAG = "UncaughtExceptionActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 读取日志，显示在屏幕上
        String msg = getIntent().getStringExtra("error");

        ScrollView scrollView = new ScrollView(this);// 防止日志太长看不完
        scrollView.setLayoutParams(new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT, ScrollView.LayoutParams.MATCH_PARENT));
        TextView textView = new TextView(this);
        textView.setText(msg);
        scrollView.addView(textView);

        setContentView(scrollView);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0, 0, 0, "重启").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
        menu.add(0, 1, 0, "上传").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case 0:
                Intent intent = new Intent(this, MainActivity.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 请勿修改，否则无法打开页面
                startActivity(intent);
                System.exit(1);// 请勿修改，否则无法打开页面

            case 1:
                // 这里自己写上传逻辑
                Toast.makeText(this, "已上传！", Toast.LENGTH_SHORT).show();
        }
        return true;
    }
}

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.ScrollView;

import android.widget.TextView;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

/**

* @ClassName UncaughtExceptionActivity

* @Description 异常页面

* @Author summerain0

* @Date 2020/9/12 11:02

public class UncaughtExceptionActivity extends AppCompatActivity {

public static final String TAG = "UncaughtExceptionActivity";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 读取日志，显示在屏幕上

String msg = getIntent().getStringExtra("error");

ScrollView scrollView = new ScrollView(this);// 防止日志太长看不完

scrollView.setLayoutParams(new ScrollView.LayoutParams(ScrollView.LayoutParams.MATCH_PARENT, ScrollView.LayoutParams.MATCH_PARENT));

TextView textView = new TextView(this);

textView.setText(msg);

scrollView.addView(textView);

setContentView(scrollView);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

menu.add(0, 0, 0, "重启").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

menu.add(0, 1, 0, "上传").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

return super.onCreateOptionsMenu(menu);

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case 0:

Intent intent = new Intent(this, MainActivity.class);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// 请勿修改，否则无法打开页面

startActivity(intent);

System.exit(1);// 请勿修改，否则无法打开页面

case 1:

// 这里自己写上传逻辑

Toast.makeText(this, "已上传！", Toast.LENGTH_SHORT).show();

}

return true;

}

新建MyApplication.java

import android.app.Application;

/**
 * @ClassName MyApplication
 * @Description TODO
 * @Author summerain0
 * @Date 2020/9/11 14:00
 */
public class MyApplication extends Application {
    public static final String TAG = "MyApplication";

    @Override
    public void onCreate() {
        super.onCreate();
        // 初始化异常处理器
        MyUncaughtExceptionHandler.getInstance(MyApplication.this).init();
    }
}

import android.app.Application;

/**

* @ClassName MyApplication

* @Description TODO

* @Author summerain0

* @Date 2020/9/11 14:00

public class MyApplication extends Application {

public static final String TAG = "MyApplication";

@Override

public void onCreate() {

super.onCreate();

// 初始化异常处理器

MyUncaughtExceptionHandler.getInstance(MyApplication.this).init();

}

修改配置文件

<application
    android:name=".MyApplication"
    ......>

    <activity
        android:label="崩溃异常"
        android:name=".UncaughtExceptionActivity" />

</application>