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APP 崩溃与自动重启观察记录

1、观察记录 1

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

2. ComputeActivity

valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{vala=10/0}

（2）测试

classMyApplication:Application(){overridefunonCreate(){super.onCreate()}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(0)}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(1)}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

2、观察记录 2

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,MiddleActivity::class.java)intent.putExtra("data",100)startActivity(intent)}

2. MiddleActivity

valtvMessage=findViewById<TextView>(R.id.tv_message)valbtnGo=findViewById<Button>(R.id.btn_go)valdata=intent.getIntExtra("data",0)if(data==0){throwIllegalArgumentException("data is 0")}tvMessage.text="data:$data"btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

3. ComputeActivity

valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{vala=10/0}

（2）测试

classMyApplication:Application(){overridefunonCreate(){super.onCreate()}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 MiddleActivity，MiddleActivity 显示：data: 100

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 MiddleActivity，MiddleActivity 显示：data: 100

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(0)}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 MiddleActivity，MiddleActivity 显示：data: 100

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(1)}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 MiddleActivity，MiddleActivity 显示：data: 100

3、观察记录 3

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

2. ComputeActivity

valtvResult=findViewById<TextView>(R.id.tv_result)valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{Thread{tvResult.text="1 + 2 = 3"}.start()}

（2）测试

classMyApplication:Application(){overridefunonCreate(){super.onCreate()}}

奔溃，退回桌面 系统打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()}}}

系统打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. throwable.printStackTrace() 打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(0)}}}

奔溃，白屏 系统打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. throwable.printStackTrace() 打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(1)}}}

奔溃，白屏 系统打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. throwable.printStackTrace() 打印：android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. APP 自动重启，打开到 LoginActivity

4、观察记录 4

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

2. ComputeActivity

valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{valname:String?=nullvallength=name!!.lengthprintln(length)}

（2）测试

classMyApplication:Application(){overridefunonCreate(){super.onCreate()}}

奔溃，白屏 系统打印：java.lang.NullPointerException APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()}}}

奔溃，白屏 系统打印：java.lang.NullPointerException throwable.printStackTrace() 打印：java.lang.NullPointerException APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(0)}}}

奔溃，白屏 系统打印：java.lang.NullPointerException throwable.printStackTrace() 打印：java.lang.NullPointerException APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(1)}}}

奔溃，白屏 系统打印：java.lang.NullPointerException throwable.printStackTrace() 打印：java.lang.NullPointerException APP 自动重启，打开到 LoginActivity

5、观察记录 5

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

2. ComputeActivity

valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{Thread{vala=10/0}.start()}

（2）测试

classMyApplication:Application(){overridefunonCreate(){super.onCreate()}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()}}}

系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(0)}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

classMyApplication:Application(){overridefunonCreate(){super.onCreate()Thread.setDefaultUncaughtExceptionHandler{thread,throwable->throwable.printStackTrace()System.exit(1)}}}

奔溃，白屏 系统打印：java.lang.ArithmeticException: divide by zero throwable.printStackTrace() 打印：java.lang.ArithmeticException: divide by zero APP 自动重启，打开到 LoginActivity

退出应用观察记录

1、观察记录 1

（1）准备阶段

valbtnTest=findViewById<Button>(R.id.btn_test)btnTest.setOnClickListener{System.exit(0)}

（2）测试

System.exit(0)

退回桌面

System.exit(1)

退回桌面

2、观察记录 2

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

2. ComputeActivity

valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{System.exit(0)}

（2）测试

System.exit(0)

退回桌面，白屏 APP 自动重启，打开到 LoginActivity

System.exit(1)

退回桌面，白屏 APP 自动重启，打开到 LoginActivity

3、准备阶段 3

（1）准备阶段

1. LoginActivity

valbtnGo=findViewById<Button>(R.id.btn_go)btnGo.setOnClickListener{valintent=Intent(this,MiddleActivity::class.java)intent.putExtra("data",100)startActivity(intent)}

2. MiddleActivity

valtvMessage=findViewById<TextView>(R.id.tv_message)valbtnGo=findViewById<Button>(R.id.btn_go)valdata=intent.getIntExtra("data",0)if(data==0){throwIllegalArgumentException("data is 0")}tvMessage.text="data:$data"btnGo.setOnClickListener{valintent=Intent(this,ComputeActivity::class.java)startActivity(intent)}

3. ComputeActivity

valbtnCompute=findViewById<Button>(R.id.btn_compute)btnCompute.setOnClickListener{System.exit(0)}

（2）测试

System.exit(0)

退回桌面，白屏 APP 自动重启，打开到 MiddleActivity，MiddleActivity 显示：data: 100

System.exit(1)

退回桌面，白屏 APP 自动重启，打开到 MiddleActivity，MiddleActivity 显示：data: 100