Binder 内存超出导致 Package manager has died 实验小结

小结"/>

Binder 内存超出导致 Package manager has died 实验小结

具体分析 Package manager has died

实验过程：

第一步：点击helloTv,不捕获throwable异常，程序崩溃，出现package manager has died异常

第二步：捕获throable异常，点击helloTv,程序不再崩溃

第三步：等for 循环结束后，点击helloTv2,可以正常输出

实验结论：

1.Package manager has died 在多线程并发情况下可能出现

2.通过捕获throwable可以捕获当时的binder异常，也就是package Manager has died异常

3.当并发结束后，binder内存释放后恢复正常，此时调用packageManager会恢复正常

4.控制并发是好的解决方案，其次是捕获异常

实验代码：

 findViewById(R.id.helloTv).setOnClickListener(new View.OnClickListener() {@Override
        public void onClick(View view) {for (int i = 0;i<1000;i++){final int n = i;
                new Thread(new Runnable() {@Override
                    public void run() {try {PackageManager packageManager = getPackageManager();
                            String versioName =  packageManager.getPackageInfo(getApplicationContext().getPackageName(), 0).versionName;
                            Thread.sleep(10000L);
                            System.out.println("ssssssssssssss:"+n+"  "+versioName);
                        } catch (PackageManager.NameNotFoundException e) {e.printStackTrace();
                        } catch (InterruptedException e) {e.printStackTrace();
                        }catch (Throwable e){e.printStackTrace();
                        }}}).start();
            }}});

    findViewById(R.id.helloTv2).setOnClickListener(new View.OnClickListener() {@Override
        public void onClick(View view) {PackageManager packageManager = getPackageManager();
            try {String versioName =  packageManager.getPackageInfo(getApplicationContext().getPackageName(), 0).versionName;
                System.out.println("ssssssssssssssfff:"+versioName);

            } catch (PackageManager.NameNotFoundException e) {e.printStackTrace();
            }}});
}