英文:
Android - how to get resource by button tag?
问题
我在我的Activity中有8个按钮，res/raw 目录中有8个小音频文件。当点击一个按钮时，应用会播放与该按钮相关联的音频。我将每个音频的名称命名为与关联按钮的标签相同或相似的名称。我想在我的Activity中只有一个方法来解决所有情况。
目前我已经有了以下代码：
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void playPhrase(View view){
if(view.getTag().toString().equals("doYouSpeak")){
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.doyouspeakenglish);
mediaPlayer.start();
}
else if(view.getTag().toString().equals("goodEvening")){
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.goodevening);
mediaPlayer.start();
}
// 其他6种情况
}
}
是否有一种方式可以通过相关的按钮标签（或ID或其他方式）访问音频，而不使用整个if/else语句？类似于：
public void playPhrase(View view){
String tag = view.getTag().toString();
MediaPlayer mediaPlayer = MediaPlayer.create(this, getResources().getIdentifier(tag, "raw", getPackageName()));
mediaPlayer.start();
}
英文:
I have 8 buttons in my Activity and 8 small audios in the res/raw directory. When one button is clicked, the app plays the audio associated with that particular button. I named each audio the same / similar to the associated button's tag. I want to have only one method in my activity that solves all cases.
This is what I have so far :
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void playPhrase(View view){
if(view.getTag().toString().equals("doYouSpeak")){
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.doyouspeakenglish);
mediaPlayer.start();
}
else if(view.getTag().toString().equals("goodEvening")){
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.goodevening);
mediaPlayer.start();
}
// the other 6 cases
}
}
Is there a way to access the audios using the associated button tag (or id or anyhow) without the whole if/else statements ? Something like :
public void playPhrase(View view){
String tag = view.getTag().toString();
MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.tag);
mediaPlayer.start();
}
答案1
得分: 1
可以使用getIdentifier()方法通过字符串名称获取ID。
String tag = view.getTag().toString();
int id = getResources().getIdentifier(tag, "raw", getPackageName());
MediaPlayer mediaPlayer = MediaPlayer.create(this, id);
mediaPlayer.start();
英文:
You can use getIdentifier() method to get the id by String name.
String tag = view.getTag().toString();
Int id = getResources().getIdentifier(tag, "raw", getPackageName());
MediaPlayer mediaPlayer = MediaPlayer.create(this, id);
mediaPlayer.start();
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