接上一篇,接下来我们看看android\vendor\qcom\opensource\fm\fmapp2\src\com\caf\fmradio\PresetList.java
定义一个List列表List<PresetStation>mPresetList = new ArrayList<PresetStation>();
同步电台数量
public synchronized int getStationCount(){
return mPresetList.size();
}
获得电台名字
public synchronized String getStationName(int stationNum){
String name = "";
if (mPresetList.size() > stationNum){
name = mPresetList.get(stationNum).getName();
}
return name;
}
获取电台频率
public synchronized int getStationFrequency(int stationNum){
int frequency = 102100;
if (mPresetList.size() > stationNum){
frequency = mPresetList.get(stationNum).getFrequency();
}
return frequency;
}
设置电台频率
public synchronized void setStationFrequency(int stationNum, int frequency){
PresetStation mStation = mPresetList.get(stationNum);
mStation.setFrequency(frequency);
}
设置电台名字
public synchronized void setStationName(int stationNum, String name){
PresetStation mStation = mPresetList.get(stationNum);
mStation.setName(name);
}
通过ID得到电台
public synchronized PresetStation getStationFromIndex(int index){
int totalPresets = mPresetList.size();
PresetStation station = null;
if (index < totalPresets) {
station = mPresetList.get(index);
}
return station;
}
通过频率得到电台
public synchronized PresetStation getStationFromFrequency(int frequency){
int totalPresets = mPresetList.size();
for (int presetNum = 0; presetNum < totalPresets; presetNum++ ) {
PresetStation station = mPresetList.get(presetNum);
if (station != null) {
if(frequency == station.getFrequency()) {
return station;
}
}
}
return null;
}
添加电台名字和频率
public synchronized PresetStation addStation(String name, int freq){
PresetStation addStation = new PresetStation(name, freq);
if(addStation != null) {
mPresetList.add(addStation);
}
return addStation;
}
添加电台
public synchronized PresetStation addStation(PresetStation station){
PresetStation addStation = null;
if(station != null) {
addStation = new PresetStation (station);
mPresetList.add(addStation);
}
return addStation;
}
删除电台
public synchronized void removeStation(int index){
int totalPresets = mPresetList.size();
if((index >= 0) && (index < totalPresets))
{
mPresetList.remove(index);
}
}
清除调频列表
public synchronized void clear(){
mPresetList.clear();
}
/ *如果用户选择一个新电台在这个列表中,将调用这个函数来更新列表。
* /
public synchronized boolean setSelectedStation(PresetStation selectStation){
int totalPresets = mPresetList.size();
if (selectStation != null) {
for (int presetNum = 0; presetNum < totalPresets; presetNum++ ) {
PresetStation station = mPresetList.get(presetNum);
if (station != null) {
if(selectStation.getFrequency() == station.getFrequency()) {
if(selectStation.getName().equalsIgnoreCase(station.getName())) {
mCurrentStation = presetNum;
return true;
}
}
}
}
}
return false;
}
/ *检查是否有相同电台存在在列表中
* /
public synchronized boolean sameStationExists(PresetStation compareStation){
int totalPresets = mPresetList.size();
if (compareStation != null) {
for (int presetNum = 0; presetNum < totalPresets; presetNum++ ) {
PresetStation station = mPresetList.get(presetNum);
if (station != null) {
if(compareStation.getFrequency() == station.getFrequency()) {
return true;
}
}
}
}
return false;
}
/ *如果用户在这个列表中选择一个新电台,将调用这个例程
*更新列表。
* /
public synchronized boolean setSelectedStation(int stationIndex){
boolean foundStation = false;
int totalPresets = mPresetList.size();
if (stationIndex < totalPresets) {
mCurrentStation = stationIndex;
foundStation = true;
}
return foundStation;
}
选择电台
public synchronized void selectStation(PresetStation selectStation){
int totalPresets = mPresetList.size();
if (selectStation != null) {
for (int presetNum = 0; presetNum < totalPresets; presetNum++ ) {
PresetStation station = mPresetList.get(presetNum);
if (station != null) {
if(selectStation.getFrequency() == station.getFrequency()) {
mCurrentStation = presetNum;
return;
}
}
}
}
}
获取选择的站
public synchronized PresetStation getSelectedStation(){
int totalPresets = mPresetList.size();
PresetStation station = null;
if (mCurrentStation < totalPresets) {
station = mPresetList.get(mCurrentStation);
}
return station;
}
选择下一个电台
public synchronized PresetStation selectNextStation(){
int totalPresets = mPresetList.size();
PresetStation station = null;
if(totalPresets > 0) {
mCurrentStation ++;
if ( (mCurrentStation) >= totalPresets) {
mCurrentStation =0;
}
station = mPresetList.get(mCurrentStation);
}
return station;
}
选择上一个电台
public synchronized PresetStation selectPrevStation(){
int totalPresets = mPresetList.size();
PresetStation station = null;
if(totalPresets > 0) {
mCurrentStation --;
if ( mCurrentStation < 0) {
mCurrentStation = totalPresets-1;
}
station = mPresetList.get(mCurrentStation);
}
return station;
来源:oschina
链接:https://my.oschina.net/u/920274/blog/2998544