1.AndroidManifest.xml版本設定為
android:minSdkVersion="14"
switch元件需要版本14以上
2./res/layout/activity_main.xml
2.MainActivity.java
package tw.android;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.media.AudioManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Switch;
import android.widget.TextView;
public class MainActivity extends Activity {
private Switch switchVolume; // 開關
private SeekBar mediaVlmSeekBar = null; // 音樂、影片、遊戲及其他媒體
private SeekBar ringerVlmSeekBar = null; // 鈴聲
private SeekBar alarmVlmSeekBar = null; // 鬧鐘
private SeekBar notifyVlmSeekBar = null; // 通知
private AudioManager audioManager = null;
private TextView tv1, tv2, tv3, tv4;
private boolean setSwitch;
private int originalMedia, originalRinger, originalAlarm, originalNotify,
setMedia, setRinger, setAlarm, setNotify;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/* 權限 */
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
this.setVolumeControlStream(AudioManager.STREAM_RING);
this.setVolumeControlStream(AudioManager.STREAM_ALARM);
this.setVolumeControlStream(AudioManager.STREAM_NOTIFICATION);
setContentView(R.layout.activity_main);
initControls();
}
@SuppressLint("InlinedApi")
private void initControls() {
// Return the handle to a system-level service - 'AUDIO'.
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
/* 手機原設定音量大小 */
originalMedia = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
originalRinger = audioManager.getStreamVolume(AudioManager.STREAM_RING);
originalAlarm = audioManager.getStreamVolume(AudioManager.STREAM_ALARM);
originalNotify = audioManager
.getStreamVolume(AudioManager.STREAM_NOTIFICATION);
// 取出最後設定音量大小
try {
SharedPreferences preferencesGet = getApplicationContext()
.getSharedPreferences("vol",
android.content.Context.MODE_PRIVATE);
setSwitch = preferencesGet.getBoolean("setSwitch", false);// 預設開關為關閉
setMedia = preferencesGet.getInt("setMedia", originalMedia); // 預設音量大小
setRinger = preferencesGet.getInt("setRinger", originalRinger);
setAlarm = preferencesGet.getInt("setAlarm", originalAlarm);
setNotify = preferencesGet.getInt("setNotify", originalNotify);
Log.i("setSwitch", setSwitch + "");
Log.i("setMedia", setMedia + "");
Log.i("setRinger", setRinger + "");
Log.i("setAlarm", setAlarm + "");
Log.i("setNotify", setNotify + "");
} catch (Exception e) {
}
/* 開關 */
switchVolume = (Switch) findViewById(R.id.switchVolume);
switchVolume.setChecked(setSwitch); // 預設開關為關閉
/* 音樂、影片、遊戲及其他媒體 */
mediaVlmSeekBar = (SeekBar) findViewById(R.id.seekBar1);
tv1 = (TextView) findViewById(R.id.tv1);
mediaVlmSeekBar.setMax(audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC)); // 最大值
/* 鈴聲 */
ringerVlmSeekBar = (SeekBar) findViewById(R.id.seekBar2);
tv2 = (TextView) findViewById(R.id.tv2);
ringerVlmSeekBar.setMax(audioManager
.getStreamMaxVolume(AudioManager.STREAM_RING));
/* 鬧鐘 */
alarmVlmSeekBar = (SeekBar) findViewById(R.id.seekBar3);
tv3 = (TextView) findViewById(R.id.tv3);
alarmVlmSeekBar.setMax(audioManager
.getStreamMaxVolume(AudioManager.STREAM_ALARM));
/* 通知 */
notifyVlmSeekBar = (SeekBar) findViewById(R.id.seekBar4);
tv4 = (TextView) findViewById(R.id.tv4);
notifyVlmSeekBar.setMax(audioManager
.getStreamMaxVolume(AudioManager.STREAM_NOTIFICATION));
/* 設定音量大小 */
mediaVlmSeekBar.setProgress(setMedia);
ringerVlmSeekBar.setProgress(setRinger);
alarmVlmSeekBar.setProgress(setAlarm);
notifyVlmSeekBar.setProgress(setNotify);
/* 開關動作 */
if (setSwitch) {
tv1.setText(audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC) + "");// 顯示大小
} else {
tv1.setText("0");// 顯示大小
}
switchVolume.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) { // 開啟
mediaVlmSeekBar.setProgress(audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC)); // 設到最大
setMedia = audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
setSwitch = true;
} else { // 關閉
mediaVlmSeekBar.setProgress(0); // 設到最小
setMedia = 0;
setSwitch = false;
}
}
});
try {
/* 音樂、影片、遊戲及其他媒體 */
mediaVlmSeekBar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
// seekbar停止時動作
public void onStopTrackingTouch(SeekBar arg0) {
}
// seekbar開始前時動作
public void onStartTrackingTouch(SeekBar arg0) {
}
// seekbar改變時動作
public void onProgressChanged(SeekBar arg0,
int progress, boolean arg2) {
tv1.setText(progress + "");// 顯示大小
audioManager.setStreamVolume(
AudioManager.STREAM_MUSIC, progress, 0);
setMedia = progress; // 修改預設值為選定大小
}
});
/* 鈴聲 */
ringerVlmSeekBar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar arg0) {
}
public void onStartTrackingTouch(SeekBar arg0) {
}
public void onProgressChanged(SeekBar arg0,
int progress, boolean arg2) {
tv2.setText(progress + "");// 顯示大小
audioManager.setStreamVolume(
AudioManager.STREAM_RING, progress, 0);
setRinger = progress; // 修改預設值為選定大小
}
});
/* 鬧鐘 */
alarmVlmSeekBar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar arg0) {
}
public void onStartTrackingTouch(SeekBar arg0) {
}
public void onProgressChanged(SeekBar arg0,
int progress, boolean arg2) {
tv3.setText(progress + "");// 顯示大小
audioManager.setStreamVolume(
AudioManager.STREAM_ALARM, progress, 0);
setAlarm = progress; // 修改預設值為選定大小
}
});
/* 通知 */
notifyVlmSeekBar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar arg0) {
}
public void onStartTrackingTouch(SeekBar arg0) {
}
public void onProgressChanged(SeekBar arg0,
int progress, boolean arg2) {
tv4.setText(progress + "");// 顯示大小
audioManager.setStreamVolume(
AudioManager.STREAM_NOTIFICATION, progress,
0);
setNotify = progress; // 修改預設值為選定大小
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
/* 結束時 */
@Override
protected void onDestroy() {
super.onDestroy();
/* 紀錄設定音量大小 */
SharedPreferences preferencesSave = getApplicationContext()
.getSharedPreferences("vol",
android.content.Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferencesSave.edit();
editor.putBoolean("setSwitch", setSwitch);
editor.putInt("setMedia", setMedia);
editor.putInt("setRinger", setRinger);
editor.putInt("setAlarm", setAlarm);
editor.putInt("setNotify", setNotify);
editor.commit();
/* 還原手機原設定音量大小 */
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, originalMedia,
0);
audioManager.setStreamVolume(AudioManager.STREAM_RING, originalRinger,
0);
audioManager.setStreamVolume(AudioManager.STREAM_ALARM, originalAlarm,
0);
audioManager.setStreamVolume(AudioManager.STREAM_NOTIFICATION,
originalNotify, 0);
Log.i("onDestroy", "onDestroy");
}
}
https://github.com/terryyamg/seekBarVolumeTest
參考連結:
http://programmerguru.com/android-tutorial/android-seekbar-example/
http://www.mysamplecode.com/2013/04/android-switch-button-example.html
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