android 如何在setting中添加HDMI选项

1.如何添加hdmi选项图标
a).将显示在目录上的图标资源添加至/ics/packages/app/Settings/res/drawable-hdpi/和/ics/packages/app/Settings/res/drawable-mdpi/中。

b).在/ics/packages/app/Settings/AndroidManifest.xml 中添加以下内容
<activity android:name="HdmiSettings"
android:label="@string/hdmi_settings"
android:clearTaskOnLaunch="true"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="com.android.settings.HDMI_SETTINGS" />
<action android:name="android.settings.HDMI_SETTINGS" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.VOICE_LAUNCH" />
<category android:name="com.android.settings.SHORTCUT" />
</intent-filter>
</activity>
c).添加相对应的字串和数组，在ics/packages/app/Settings/res/values/strings.xml中添加内容
<!-- add the hdmi in setting interface by lorry-->
<string name="hdmi_switch_title">HDMI</string>
<string name="hdmi_switch_summary"></string>
<string name="hdmi_mode_title">Hdmi Display Mode</string>
<string name="hdmi_mode_summary">Please select the display mode you want to use</string>
<string name="hdmi_settings">HDMI Setting</string>
在ics/packages/app/Settings/res/values/arrays.xml中添加内容

<!-- HDMI Mode settings. add by lorry. -->
<string-array name="hdmi_mode_entries">
<item>1920x1080</item>
<item>1280x720</item>
<item>720x576</item>
<item>720x480</item>
</string-array>
<string-array name="hdmi_mode_values">
<item>0</item>
<item>1</item>
<item>2</item>
<item>3</item>
</string-array>
<string-array name="hdmi_mode_summaries">
<item>The current mode is 1920x1080 mode</item>
<item>The current mode is 1280x720 mode</item>
<item>The current mode is 720x576 mode</item>
<item>The current mode is 720x480 mode</item>
</string-array>
d).如果对hdmi模块在布局方面有一些特别的要求，可以在res/layout/目录下添加对应的xml文件。

2.HDMI setting 格式设计
在/packages/apps/Settings/src/com/android/settings/目录下创建Hdmi_setting.java
采用一个checkbox来设定HDMI的开关，采取一个列表来选择HDMI的参数模式。
在public void onCreate(Bundle icicle) {
super.onCreate(icicle);
…
}
中添加以下内容，设定HDMI界面的模式风格
ContentResolver resolver = getContentResolver();
WindowManager=IWindowManager.Stub.asInterface(ServiceManager.getService("window"));
addPreferencesFromResource(R.xml.hdmi_setting);
mHdmiAccelerometer = (CheckBoxPreference) findPreference(KEY_HDMI_SWITCH);
mHdmiAccelerometer.setOnPreferenceChangeListener(this);
mHdmiModes = (ListPreference) findPreference(KEY_HDMI_ACCELEROMETER);
mHdmiModes.setOnPreferenceChangeListener(this);

3.如何调用HdmiSettings类

在ics/packages/app/Settings/res/xml/setting.xml中添加以下内容
<com.android.settings.IconPreferenceScreen
settings:icon="@drawable/ic_settings_hdmi"
android:title="@string/hdmi_settings">
<intent
android:action="android.intent.action.MAIN"
android:targetPackage="com.android.settings"
android:targetClass="com.android.settings.HdmiSettings" />
</com.android.settings.IconPreferenceScreen>
4.如何保存当前的控件的值。
a). 在franeworks/base/core/java/android/provider/Setting.java中添加两个值的变量的定义
public static final String HDMI_SETTINGS_STATUS = "hdmi_settings_status";
public static final String HDMI_SETTINGS_MODE = "hdmi_settings_mode";
并在SETTINGS_TO_BACKUP数组中添加这两个成员。

b).在ics/frameworks/base/packages/SettingProvider/src/com/android/providers/settings
/DatabaseHelper.java 中添加以下语句
Loadsetting(stmt,settings.system.HDMI_SETTINGS_STATUS,0);
Loadsetting(stmt,settings.system.HDMI_SETTINGS_MODE,0);
5.如何调用hdmi脚本

a).build the hdmi lib
将pp1938的hdmi代码移植，并添加android.mk文件，将该代码编译成一个动态的库，这样就可以在android中采取jni的模式来调用.

b).在ics/frameworks/base/core/jni中创建一个android_setting_HdmiJNI.cpp并添加以下代码
static int JNICALL android_setting_HdmiJNI_RunHDMI(JNIEnv * env, jobject obj, jint opt)
{
return run_hdmi(opt);
}
static int JNICALL android_setting_HdmiJNI_ChangeHdmiMode(JNIEnv * env, jobject obj, jint opt)
{
LOGE("run hdmi function test \n");
return change_hdmi_mode(opt);
}

static int JNICALL android_setting_HdmiJNI_StopHDMI(JNIEnv * env, jobject obj)
{
LOGE("stop hdmi function test\n");
return stop_hdmi();
}

static int JNICALL android_setting_HdmiJNI_Hot_plug_detect(JNIEnv * env, jobject obj)
{
LOGE("hot plug detect function test\n");
return hot_plug_detect();
}

static JNINativeMethod gMethods[] = {
{"RunHDMI", "(I)I", (void *) android_setting_HdmiJNI_RunHDMI},
{"ChangeHdmiMode", "(I)I", (void *) android_setting_HdmiJNI_ChangeHdmiMode},
{"StopHDMI", "()I", (void *) android_setting_HdmiJNI_StopHDMI},
{"Hot_plug_detect", "()I", (void *) android_setting_HdmiJNI_Hot_plug_detect},
};

int register_android_setting_HdmiJNI(JNIEnv * env)
{
return jniRegisterNativeMethods(env, "android/setting/HdmiJNI",gMethods, NELEM(gMethods));
}

c)在AndroidRuntime.cpp中添加extern int register_android_setting_HdmiJNI(JNIEnv*
env);声明，并在数组gRegJNI中添加REG_JNI(register_android_setting_HdmiJNI),

d)修改android.mk文件，并添加相对应的路径包含,

e) 在ics/frameworks/base/core/java/android/setting路径下添加HdmiJNI.java文件
并添加以下代码

package android.setting;

/** {@hide} */
public class HdmiJNI
{
public HdmiJNI()
{
}
public native int RunHDMI(int opt);
public native int ChangeHdmiMode(int opt);
public native int StopHDMI();
public native int Hot_plug_detect();

}


f)在ics/packages/apps/Settings/src/com/android/settings/HdmiSettings.java中添加
import android.setting.HdmiJNI;
import static android.provider.Settings.System.HDMI_SETTINGS_STATUS;
import static android.provider.Settings.System.HDMI_SETTINGS_MODE;

等并使用对用的函数来执行对应的操作，

注意：若出现无法识别以上的类和变量，请make update-api.