说说自己的经历吧：
（1）开始为了隐藏systemui利用过killcom.android.systemui线程进行的隐藏，但是总有一个com.android.systemui.SystemUIService进行启动
我开始还是比较的坏的就弄了一个监听每500毫秒进行检测一次进行查杀
代码：
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ActivityManageram=(ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);//获得activity管理
List<RunningAppProcessInfo>infos=am.getRunningAppProcesses();
for(RunningAppProcessInforunningAppProcessInfo:infos){
System.out.println("processName:====================:"+runningAppProcessInfo.processName);
if(runningAppProcessInfo.processName.equals("com.android.systemui")){
System.out.println("processpid:"+runningAppProcessInfo.pid);
Stringstr="/system/bin/kill"+runningAppProcessInfo.pid;
System.out.println("str:"+str);
Processprocess;
Runtimeruntime;
try{
runtime=Runtime.getRuntime();
process=runtime.exec("su");
System.out.println("01010101010");
process=runtime.exec(str);
intexitVal=process.waitFor();
System.out.println("66666666666666666666666");
break;
}catch(IOExceptione){
System.out.println(e);
}catch(InterruptedExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);// 获得activity管理
List<RunningAppProcessInfo> infos = am.getRunningAppProcesses();
for (RunningAppProcessInfo runningAppProcessInfo : infos) {
System.out.println("processName:====================:"+runningAppProcessInfo.processName);
if(runningAppProcessInfo.processName.equals("com.android.systemui")){
System.out.println("processpid: "+runningAppProcessInfo.pid);
String str = "/system/bin/kill "+runningAppProcessInfo.pid;
System.out.println("str: "+str);
Process process;
Runtime runtime;
try {
runtime = Runtime.getRuntime();
process = runtime.exec("su");
System.out.println("01010101010");
process = runtime.exec(str);
int exitVal = process.waitFor();
System.out.println("66666666666666666666666");
break;
} catch (IOException e) {
System.out.println(e);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}（2）通过长时间研究我研究到了SystemUI.apk，我就就想对这个东西进行操作了。开始我删除掉后，systeui还是运行着，我就用kill命令直接杀掉这个线程，然后就开始报错了。说找不到SystemUI什么的。及其的烦人，不过重新启动就可以了。就没有那个错误了。
苍天真的不负有心人，本人找到一个更好的方法，原来大概是这样的：通过命令移除SystemUI.apk放到一个文件夹中，然后重新启动com.systemui.SystemUIService这个服务
就可以了。如果想恢复就把SystemUI.apk移到/system/app/下并且重新启动com.systemui.SystemUIService这个服务
代码参照：
FilesystemUIapkFile=newFile("/system/app/SystemUI.apk");
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
finalToggleButtonsystemBarToggleButton=(ToggleButton)findViewById(R.id.systemBarToggleButton);
systemBarToggleButton.setChecked(systemUIapkFile.exists());
systemBarToggleButton.setOnCheckedChangeListener(newOnCheckedChangeListener(){
@Override
publicvoidonCheckedChanged(CompoundButtonbuttonView,booleanisChecked){
systemBarToggleButton.setChecked(isChecked);
switchSystemUI();
if(isChecked){
Intentintent=newIntent();
intent.setComponent(newComponentName(
"com.android.systemui",
"com.android.systemui.SystemUIService"));
startService(intent);
}
}
});
}
privatevoidswitchSystemUI(){
try{
Processp;
p=Runtime.getRuntime().exec("su");
//Attempttowriteafiletoaroot-only
DataOutputStreamos=newDataOutputStream(p.getOutputStream());
os.writeBytes("mount-oremount,rw/dev/block/stl6/system\n");
if(systemUIapkFile.exists()){
os.writeBytes("mv/system/app/SystemUI.apk/system/SystemUI.apk\n");
}else{
os.writeBytes("mv/system/SystemUI.apk/system/app/SystemUI.apk\n");
}
os.writeBytes("mount-oremount,ro/dev/block/stl6/system\n");
//Closetheterminal
os.writeBytes("exit\n");
os.flush();
p.waitFor();
}catch(Exceptione){
ShowErrorGlobal(e);
}
}
protectedvoidShowErrorGlobal(Exceptione){
ByteArrayOutputStreambaos=newByteArrayOutputStream();
PrintStreamstream=newPrintStream(baos);
e.printStackTrace(stream);
stream.flush();
newAlertDialog.Builder(this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle("Epicfail")
.setMessage("Error:"+newString(baos.toByteArray())).show();
}
File systemUIapkFile = new File("/system/app/SystemUI.apk");
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final ToggleButton systemBarToggleButton = (ToggleButton) findViewById(R.id.systemBarToggleButton);
systemBarToggleButton.setChecked(systemUIapkFile.exists());
systemBarToggleButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
systemBarToggleButton.setChecked(isChecked);
switchSystemUI();
if (isChecked) {
Intent intent = new Intent();
intent.setComponent(new ComponentName(
"com.android.systemui",
"com.android.systemui.SystemUIService"));
startService(intent);
}
}
});
}
private void switchSystemUI() {
try {
Process p;
p = Runtime.getRuntime().exec("su");
// Attempt to write a file to a root-only
DataOutputStream os = new DataOutputStream(p.getOutputStream());
os.writeBytes("mount -o remount,rw /dev/block/stl6 /system\n");
if (systemUIapkFile.exists()) {
os.writeBytes("mv /system/app/SystemUI.apk /system/SystemUI.apk\n");
}else {
os.writeBytes("mv /system/SystemUI.apk /system/app/SystemUI.apk\n");
}
os.writeBytes("mount -o remount,ro /dev/block/stl6 /system\n");
// Close the terminal
os.writeBytes("exit\n");
os.flush();
p.waitFor();
} catch (Exception e) {
ShowErrorGlobal(e);
}
}
protected void ShowErrorGlobal(Exception e) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream stream = new PrintStream(baos);
e.printStackTrace(stream);
stream.flush();
new AlertDialog.Builder(this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle("Epic fail")
.setMessage("Error: " + new String(baos.toByteArray())).show();
}
（3）
这种更牛逼，什么还自己通过命令操作。都是也路子。人家google给咱提供的有接口直接用就行啊
直接代码参考吧：
intflag=context.getWindow().getDecorView().getSystemUiVisibility();
//intfullScreen=View.SYSTEM_UI_FLAG_SHOW_FULLSCREEN;
intfullScreen=0x8;
if(visible){
if((flag&fullScreen)!=0){
context.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
}
}else{
if((flag&fullScreen)==0){
context.getWindow().getDecorView().setSystemUiVisibility(flag|fullScreen);
}
}
