折腾：
【未解决】Android Studio中gradle编译rcjsta项目多个使用或覆盖了已过时的API等报错
期间，继续去解决编译错误：
> Task :tts:compileDebugJavaWithJavac 注: 某些输入文件使用或覆盖了已过时的 API。 注: 有关详细信息, 请使用 -Xlint:deprecation 重新编译。
如之前一样，去加上参数：
build.gradle
allprojects {
repositories {
// google()
maven { url 'https://maven.aliyun.com/repository/google' }
maven { url 'https://maven.aliyun.com/repository/public' }
// jcenter()
}
gradle.projectsEvaluated {
tasks.withType(JavaCompile) {
// options.compilerArgs << "-Xlint:unchecked"
options.compilerArgs << "-Xlint:deprecation"
}
}
}重新编译，看看具体是哪里报错了。
看到了，且compileDebugJavaWithJavac下面有2个文件，5个警告
先看第一个：
rcsjta/samples/api/tts/src/com/orangelabs/rcs/tts/PlayTextToSpeech.java
58: 警告: [deprecation] Service中的onStart(Intent,int)已过时
public void onStart(Intent intent, int startId) {
^去看看
好像看不出啥
从源码的：
public class PlayTextToSpeech extends Service implements OnInitListener {找到其被实现的类
android/app/Service.java
/**
* @deprecated Implement {@link #onStartCommand(Intent, int, int)} instead.
*/
@Deprecated
public void onStart(Intent intent, int startId) {
}onStart的确已过时，建议换：onStartCommand
/**
* Called by the system every time a client explicitly starts the service by calling
* {@link android.content.Context#startService}, providing the arguments it supplied and a
* unique integer token representing the start request. Do not call this method directly.
*
* <p>For backwards compatibility, the default implementation calls
* {@link #onStart} and returns either {@link #START_STICKY}
* or {@link #START_STICKY_COMPATIBILITY}.
*
* <p>If you need your application to run on platform versions prior to API
* level 5, you can use the following model to handle the older {@link #onStart}
* callback in that case. The <code>handleCommand</code> method is implemented by
* you as appropriate:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/ForegroundService.java
* start_compatibility}
*
* <p class="caution">Note that the system calls this on your
* service's main thread. A service's main thread is the same
* thread where UI operations take place for Activities running in the
* same process. You should always avoid stalling the main
* thread's event loop. When doing long-running operations,
* network calls, or heavy disk I/O, you should kick off a new
* thread, or use {@link android.os.AsyncTask}.</p>
*
* @param intent The Intent supplied to {@link android.content.Context#startService},
* as given. This may be null if the service is being restarted after
* its process has gone away, and it had previously returned anything
* except {@link #START_STICKY_COMPATIBILITY}.
* @param flags Additional data about this start request. Currently either
* 0, {@link #START_FLAG_REDELIVERY}, or {@link #START_FLAG_RETRY}.
* @param startId A unique integer representing this specific request to
* start. Use with {@link #stopSelfResult(int)}.
*
* @return The return value indicates what semantics the system should
* use for the service's current started state. It may be one of the
* constants associated with the {@link #START_CONTINUATION_MASK} bits.
*
* @see #stopSelfResult(int)
*/
public int onStartCommand(Intent intent, int flags, int startId) {
onStart(intent, startId);
return mStartCompatibility ? START_STICKY_COMPATIBILITY : START_STICKY;
}那就看看，如何换，毕竟好像多出一个参数，看看如何赋值
- onStart(Intent intent, int startId)
- onStartCommand(Intent intent, int flags, int startId)
多出个flags
默认都给0？
deprecation Service中的onStart(Intent,int)已过时
service onstart intent int deprecated
service onstart intent int deprecated onStartCommand
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
showLog("onStartCommand is called");
//Service运行在UI主线程，为了避免因堵塞而被关闭，另开一个线程
new Thread(this).start();
return super.onStartCommand(intent, flags, startId);
}好像flags是传递进来的？
好像直接把上述的
@Override
public void onStart(Intent intent, int startId) {改为：onStartCommand
@Override
// public void onStart(Intent intent, int startId) {
public int onStartCommand(Intent intent, int flags, int startId) {
Log.v(TAG, "Start TTS");
// Get parameters
messages = intent.getStringArrayListExtra("messages");
// Instanciate the TTS engine
try {
tts = new TextToSpeech(getApplicationContext(), this);
} catch (Exception e) {
Log.v(TAG, "Can't instanciate TTS engine");
e.printStackTrace();
}
return super.onStartCommand(intent, flags, startId);
}
是不是就可以了？
去试试，重新编译，果然此处警告消失了。
【总结】
此处，Android中，之前实现Service，是要实现onStart
@Override
public void onStart(Intent intent, int startId) {现在：onStart已过时废弃
所以改为推荐的onStartCommand
整体改动，从：
@Override
public void onStart(Intent intent, int startId) {
Log.v(TAG, "Start TTS");
// Get parameters
messages = intent.getStringArrayListExtra("messages");
// Instanciate the TTS engine
try {
tts = new TextToSpeech(getApplicationContext(), this);
} catch (Exception e) {
Log.v(TAG, "Can't instanciate TTS engine");
e.printStackTrace();
}
}改为：
@Override
// public void onStart(Intent intent, int startId) {
public int onStartCommand(Intent intent, int flags, int startId) {
Log.v(TAG, "Start TTS");
// Get parameters
messages = intent.getStringArrayListExtra("messages");
// Instanciate the TTS engine
try {
tts = new TextToSpeech(getApplicationContext(), this);
} catch (Exception e) {
Log.v(TAG, "Can't instanciate TTS engine");
e.printStackTrace();
}
return super.onStartCommand(intent, flags, startId);
}即可。
主要改动：
- 把onStart换成onStartCommand
- 最后加上return返回
- return super.onStartCommand(intent, flags, startId);
转载请注明：在路上 » 【已解决】rcsjta项目编译出错：Task tts compileDebugJavaWithJavac 警告 deprecation Service中的onStart(Intent,int)已过时