默认user版本不显示开发者选项这一栏,需要通过连续点击版本号7次来显示.

packages\apps\Settings\src\com\android\settings\DeviceInfoSettings.java

static final int TAPS_TO_BE_A_DEVELOPER = 7;

public void onResume() {

super.onResume();

mDevHitCountdown =

getActivity().getSharedPreferences(DevelopmentSettings.PREF_FILE,

Context.MODE_PRIVATE).getBoolean(DevelopmentSettings.PREF_SHOW,

android.os.Build.TYPE.equals("eng")) ? -1 :

TAPS_TO_BE_A_DEVELOPER;

mDevHitToast = null;

}

public boolean onPreferenceTreeClick(PreferenceScreen

preferenceScreen, Preference preference) {

......

if (mDevHitCountdown > 0) {

mDevHitCountdown--;

if (mDevHitCountdown == 0) {

getActivity().getSharedPreferences(DevelopmentSettings.PREF_FILE,

Context.MODE_PRIVATE).edit().putBoolean(

DevelopmentSettings.PREF_SHOW, true).apply();

if (mDevHitToast != null) {

mDevHitToast.cancel();

}

mDevHitToast = Toast.makeText(getActivity(),

R.string.show_dev_on,

Toast.LENGTH_LONG);

mDevHitToast.show();

// This is good time to index the Developer

Options

Index.getInstance(

getActivity().getApplicationContext()).updateFromClassNameResource(

DevelopmentSettings.class.getName(), true,

true);

} else if (mDevHitCountdown > 0

&& mDevHitCountdown <

(TAPS_TO_BE_A_DEVELOPER-2)) {

if (mDevHitToast != null) {

mDevHitToast.cancel();

}

mDevHitToast = Toast.makeText(getActivity(),

getResources().getQuantityString(

R.plurals.show_dev_countdown, mDevHitCountdown,

mDevHitCountdown),

Toast.LENGTH_SHORT);

mDevHitToast.show();

}

} else if (mDevHitCountdown < 0) {

//点击完7次之后显示

if (mDevHitToast != null) {

mDevHitToast.cancel();

}

mDevHitToast = Toast.makeText(getActivity(),

R.string.show_dev_already,

Toast.LENGTH_LONG);

mDevHitToast.show();

}

}

......

}

而默认开机是否显示由变量showDev控制

packages\apps\Settings\src\com\android\settings\SettingsActivity.java

private void updateTilesList(List target) {

final boolean showDev =

mDevelopmentPreferences.getBoolean(

DevelopmentSettings.PREF_SHOW,

android.os.Build.TYPE.equals("eng")); //因此eng才返回true

......

} else if (id == R.id.development_settings) {

if (!showDev || um.hasUserRestriction(

UserManager.DISALLOW_DEBUGGING_FEATURES)) {

removeTile = true; //showDev为false则不显示

}

}

}

解决方法:

diff --git

a/src/com/android/settings/SettingsActivity.java

b/src/com/android/settings/SettingsActivity.java

index 645add3..11a9c55 100755

---

a/src/com/android/settings/SettingsActivity.java

+++

b/src/com/android/settings/SettingsActivity.java

@@ -1236,9 +1236,11 @@ public class SettingsActivity

extends Activity

}

private void updateTilesList(List target) {

- final boolean showDev =

mDevelopmentPreferences.getBoolean(

- DevelopmentSettings.PREF_SHOW,

- android.os.Build.TYPE.equals("eng"));

+

+ // final boolean showDev =

mDevelopmentPreferences.getBoolean(

+ // DevelopmentSettings.PREF_SHOW,

+ //android.os.Build.TYPE.equals("eng"));

+ final

boolean showDev = true;