{"id":689,"date":"2022-11-26T18:59:14","date_gmt":"2023-03-22T04:40:11","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%b8%a6%e6%9c%89seekbar%e7%9a%84%e5%ae%89%e5%8d%93%e5%aa%92%e4%bd%93%e6%92%ad%e6%94%be%e5%99%a8%e7%9a%84%e6%ad%8c%e6%9b%b2\/"},"modified":"2025-08-03T03:09:37","modified_gmt":"2025-08-02T19:09:37","slug":"%e5%b8%a6%e6%9c%89seekbar%e7%9a%84%e5%ae%89%e5%8d%93%e5%aa%92%e4%bd%93%e6%92%ad%e6%94%be%e5%99%a8%e7%9a%84%e6%ad%8c%e6%9b%b2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b8%a6%e6%9c%89seekbar%e7%9a%84%e5%ae%89%e5%8d%93%e5%aa%92%e4%bd%93%e6%92%ad%e6%94%be%e5%99%a8%e7%9a%84%e6%ad%8c%e6%9b%b2\/","title":{"rendered":"\u5b89\u5353\u5f00\u53d1\uff1a\u5b9e\u73b0\u5e26SeekBar\u7684\u5a92\u4f53\u64ad\u653e\u5668\u6b4c\u66f2\u63a7\u5236"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5e26\u6709SeekBar\u7684\u5b89\u5353\u5a92\u4f53\u64ad\u653e\u5668\u7684\u6b4c\u66f2\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528MediaPlayer\u7c7b\u5728\u6211\u4eec\u7684Android\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u57fa\u672c\u7684\u97f3\u9891\u64ad\u653e\u5668\u3002\u6211\u4eec\u5c06\u6dfb\u52a0\u4e00\u4e2a\u64ad\u653e\/\u505c\u6b62\u529f\u80fd\uff0c\u5e76\u5141\u8bb8\u7528\u6237\u901a\u8fc7SeekBar\u6765\u6539\u53d8\u6b4c\u66f2\u7684\u4f4d\u7f6e\u3002<\/p>\n<h2>\u5b89\u5353\u5a92\u4f53\u64ad\u653e\u5668MediaPlayer\u7c7b\u7528\u4e8e\u64ad\u653e\u97f3\u9891\u548c\u89c6\u9891\u6587\u4ef6\u3002\u6211\u4eec\u5c06\u4f7f\u7528MediaPlayer\u7c7b\u7684\u5e38\u89c1\u65b9\u6cd5\uff1a<\/h2>\n<ul class=\"post-ul\">\n<li>start()<\/li>\n<li>stop()<\/li>\n<li>release() &#8211; \u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<li>seekTo(position) &#8211; \u5c06\u4e0eSeekBar\u4e00\u8d77\u4f7f\u7528<\/li>\n<li>isPlaying() &#8211; \u8ba9\u6211\u4eec\u77e5\u9053\u6b4c\u66f2\u662f\u5426\u6b63\u5728\u64ad\u653e\u3002<\/li>\n<li>getDuration() &#8211; \u7528\u4e8e\u83b7\u53d6\u603b\u65f6\u957f\u3002\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\u6211\u4eec\u5c06\u77e5\u9053SeekBar\u7684\u4e0a\u9650\u3002\u6b64\u51fd\u6570\u8fd4\u56de\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\u7684\u65f6\u957f\u3002<\/li>\n<li>setDataSource(FileDescriptor fd) &#8211; \u7528\u4e8e\u8bbe\u7f6e\u8981\u64ad\u653e\u7684\u6587\u4ef6\u3002<\/li>\n<li>setVolume(float leftVolume, float rightVolume) &#8211; \u7528\u4e8e\u8bbe\u7f6e\u97f3\u91cf\u7ea7\u522b\u3002\u503c\u662f0\u52301\u4e4b\u95f4\u7684\u6d6e\u70b9\u6570\u3002<\/li>\n<\/ul>\n<p>\u6211\u4eec\u5c06\u64ad\u653e\u5b58\u50a8\u5728Android Studio\u9879\u76ee\u7684assets\u6587\u4ef6\u5939\u4e2d\u7684mp3\u6587\u4ef6\u3002\u4eceAssets\u6587\u4ef6\u5939\u4e2d\u83b7\u53d6\u58f0\u97f3\u8d44\u4ea7\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code>AssetFileDescriptor descriptor = getAssets().openFd(\"filename\");\r\n                mediaPlayer.setDataSource(descriptor.getFileDescriptor(), descriptor.getStartOffset(), descriptor.getLength());\r\n                descriptor.close();\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u521b\u5efa\u4e00\u4e2a\u53ef\u4ee5\u64ad\u653e\u97f3\u9891\u5e76\u53ef\u4ee5\u4fee\u6539\u5f53\u524d\u97f3\u4e50\u66f2\u76ee\u4f4d\u7f6e\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u6211\u4eec\u9700\u8981\u5b9e\u73b0\u4e09\u4ef6\u4e8b\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>MediaPlayer<\/li>\n<li>\u5e26\u6587\u672c\u7684SeekBar &#8211; \u5728\u6ed1\u5757\u65c1\u8fb9\u663e\u793a\u5f53\u524d\u8fdb\u5ea6\u65f6\u95f4\u3002<\/li>\n<li>\u53ef\u8fd0\u884c\u7ebf\u7a0b &#8211; \u7528\u4e8e\u66f4\u65b0SeekBar\u3002<\/li>\n<\/ul>\n<h3>\u9879\u76ee\u7ed3\u6784<\/h3>\n<p>\u5728\u4f60\u7684 build.gradle \u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4f9d\u8d56\u9879\u3002<\/p>\n<pre class=\"post-pre\"><code>implementation 'com.android.support:design:28.0.0-alpha3'\r\n<\/code><\/pre>\n<h3>\u7f16\u7801<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5e26\u6709SeekBar\u7684\u5b89\u5353\u5a92\u4f53\u64ad\u653e\u5668\u7684\u6b4c\u66f2\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4ee5\u4e0b\u662factivity_main.xml\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;LinearLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    xmlns:app=\"https:\/\/schemas.android.com\/apk\/res-auto\"\r\n    xmlns:tools=\"https:\/\/schemas.android.com\/tools\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    android:layout_gravity=\"center\"\r\n    android:gravity=\"center\"\r\n    android:layout_margin=\"16dp\"\r\n    android:orientation=\"vertical\"\r\n    tools:context=\".MainActivity\"&gt;\r\n\r\n\r\n    &lt;TextView\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:gravity=\"center\"\r\n        android:text=\"\u64ad\u653e\/\u505c\u6b62\u6b4c\u66f2\u3002\\n\u4f7f\u7528SeekBar\u62d6\u52a8\u8fdb\u5ea6\"\r\n        android:textStyle=\"bold\" \/&gt;\r\n\r\n\r\n    &lt;SeekBar\r\n        android:id=\"@+id\/seekbar\"\r\n        android:layout_margin=\"16dp\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_gravity=\"center\" \/&gt;\r\n\r\n\r\n    &lt;TextView\r\n        android:id=\"@+id\/textView\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\" \/&gt;\r\n\r\n\r\n    &lt;android.support.design.widget.FloatingActionButton\r\n        android:id=\"@+id\/button\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_margin=\"16dp\"\r\n        android:src=\"@android:drawable\/ic_media_play\"\r\n        android:text=\"\u64ad\u653e\u97f3\u9891\" \/&gt;\r\n\r\n&lt;\/LinearLayout&gt;\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u5df2\u7ecf\u6dfb\u52a0\u4e86\u4e00\u4e2a\u6d6e\u52a8\u64cd\u4f5c\u6309\u94ae(FloatingActionButton)\uff0c\u70b9\u51fb\u65f6\u4f1a\u64ad\u653e\u6216\u505c\u6b62\u97f3\u9891\u3002MainActivity.java\u7c7b\u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.androidmediaplayersong;\r\n\r\nimport android.content.res.AssetFileDescriptor;\r\nimport android.media.MediaPlayer;\r\nimport android.support.design.widget.FloatingActionButton;\r\nimport android.support.v4.content.ContextCompat;\r\nimport android.support.v7.app.AppCompatActivity;\r\nimport android.os.Bundle;\r\nimport android.view.View;\r\nimport android.widget.SeekBar;\r\nimport android.widget.TextView;\r\n\r\npublic class MainActivity extends AppCompatActivity implements Runnable {\r\n\r\n\r\n    MediaPlayer mediaPlayer = new MediaPlayer();\r\n    SeekBar seekBar;\r\n    boolean wasPlaying = false;\r\n    FloatingActionButton fab;\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_main);\r\n\r\n\r\n        fab = findViewById(R.id.button);\r\n\r\n        fab.setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View view) {\r\n                playSong();\r\n            }\r\n        });\r\n\r\n        final TextView seekBarHint = findViewById(R.id.textView);\r\n\r\n        seekBar = findViewById(R.id.seekbar);\r\n\r\n        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {\r\n            @Override\r\n            public void onStartTrackingTouch(SeekBar seekBar) {\r\n\r\n                seekBarHint.setVisibility(View.VISIBLE);\r\n            }\r\n\r\n            @Override\r\n            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {\r\n                seekBarHint.setVisibility(View.VISIBLE);\r\n                int x = (int) Math.ceil(progress \/ 1000f);\r\n\r\n                if (x < 10)\r\n                    seekBarHint.setText(\"0:0\" + x);\r\n                else\r\n                    seekBarHint.setText(\"0:\" + x);\r\n\r\n                if (x > 0 && mediaPlayer != null && !mediaPlayer.isPlaying()) {\r\n                    clearMediaPlayer();\r\n                    fab.setImageDrawable(ContextCompat.getDrawable(MainActivity.this, android.R.drawable.ic_media_play));\r\n                    MainActivity.this.seekBar.setProgress(0);\r\n                }\r\n\r\n            }\r\n\r\n            @Override\r\n            public void onStopTrackingTouch(SeekBar seekBar) {\r\n\r\n\r\n                if (mediaPlayer != null && mediaPlayer.isPlaying()) {\r\n                    mediaPlayer.seekTo(seekBar.getProgress());\r\n                }\r\n            }\r\n        });\r\n    }\r\n\r\n    public void playSong() {\r\n\r\n        try {\r\n\r\n\r\n            if (mediaPlayer != null && mediaPlayer.isPlaying()) {\r\n                clearMediaPlayer();\r\n                seekBar.setProgress(0);\r\n                wasPlaying = true;\r\n                fab.setImageDrawable(ContextCompat.getDrawable(MainActivity.this, android.R.drawable.ic_media_play));\r\n            }\r\n\r\n\r\n            if (!wasPlaying) {\r\n\r\n                if (mediaPlayer == null) {\r\n                    mediaPlayer = new MediaPlayer();\r\n                }\r\n\r\n                fab.setImageDrawable(ContextCompat.getDrawable(MainActivity.this, android.R.drawable.ic_media_pause));\r\n\r\n                AssetFileDescriptor descriptor = getAssets().openFd(\"suits.mp3\");\r\n                mediaPlayer.setDataSource(descriptor.getFileDescriptor(), descriptor.getStartOffset(), descriptor.getLength());\r\n                descriptor.close();\r\n\r\n                mediaPlayer.prepare();\r\n                mediaPlayer.setVolume(0.5f, 0.5f);\r\n                mediaPlayer.setLooping(false);\r\n                seekBar.setMax(mediaPlayer.getDuration());\r\n\r\n                mediaPlayer.start();\r\n                new Thread(this).start();\r\n\r\n            }\r\n\r\n            wasPlaying = false;\r\n        } catch (Exception e) {\r\n            e.printStackTrace();\r\n\r\n        }\r\n    }\r\n\r\n    public void run() {\r\n\r\n        int currentPosition = mediaPlayer.getCurrentPosition();\r\n        int total = mediaPlayer.getDuration();\r\n\r\n\r\n        while (mediaPlayer != null && mediaPlayer.isPlaying() && currentPosition < total) {\r\n            try {\r\n                Thread.sleep(1000);\r\n                currentPosition = mediaPlayer.getCurrentPosition();\r\n            } catch (InterruptedException e) {\r\n                return;\r\n            } catch (Exception e) {\r\n                return;\r\n            }\r\n\r\n            seekBar.setProgress(currentPosition);\r\n\r\n        }\r\n    }\r\n\r\n    @Override\r\n    protected void onDestroy() {\r\n        super.onDestroy();\r\n        clearMediaPlayer();\r\n    }\r\n\r\n    private void clearMediaPlayer() {\r\n        mediaPlayer.stop();\r\n        mediaPlayer.release();\r\n        mediaPlayer = null;\r\n    }\r\n}\r\n\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u70b9\u51fb\u6d6e\u52a8\u64cd\u4f5c\u6309\u94ae(FloatingActionButton)\u540e\uff0cplaySong\u51fd\u6570\u4f1a\u88ab\u89e6\u53d1\u3002\u5728\u8be5\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u4f1a\u505c\u6b62\u6b4c\u66f2\u5e76\u91cd\u7f6eMediaPlayer\u548c\u6d6e\u52a8\u64cd\u4f5c\u6309\u94ae\u7684\u56fe\u6807\uff0c\u6bcf\u9694\u4e00\u79d2\u6267\u884c\u4e00\u6b21\u3002\u4e00\u65e6\u8c03\u7528\u4e86mediaPlayer.prepare()\u65b9\u6cd5\uff0c\u6b4c\u66f2\u7684\u8be6\u7ec6\u4fe1\u606f\u5c31\u4f1a\u53ef\u7528\u3002\u6211\u4eec\u73b0\u5728\u53ef\u4ee5\u83b7\u53d6\u6301\u7eed\u65f6\u95f4\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3aSeekBar\u7684\u6700\u5927\u4f4d\u7f6e\u3002\u5c06setLooping\u8bbe\u7f6e\u4e3afalse\u53ef\u4ee5\u907f\u514d\u6b4c\u66f2\u65e0\u9650\u5faa\u73af\u64ad\u653e\uff0c\u76f4\u5230\u7528\u6237\u624b\u52a8\u505c\u6b62\u3002\u6211\u4eec\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u6765\u89e6\u53d1\u5df2\u5b9e\u73b0\u7684Runnable\u63a5\u53e3\u7684run\u65b9\u6cd5\u3002\u5728run\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u6bcf\u79d2\u66f4\u65b0\u4e00\u6b21\u8fdb\u5ea6\uff0c\u8fd9\u4f1a\u89e6\u53d1SeekBar\u76d1\u542c\u5668\u7684onProgressChanged\u65b9\u6cd5\u3002\u5728\u76d1\u542c\u5668\u4e2d\uff0c\u6211\u4eec\u5c06TextView\u7684\u504f\u79fb\u91cf\u8bbe\u7f6e\u4e3aSeekBar\u7684\u6ed1\u5757\u4e0b\u65b9\u3002\u6211\u4eec\u901a\u8fc7\u5c06\u6beb\u79d2\u8f6c\u6362\u4e3a\u79d2\u6765\u8bbe\u7f6e\u65f6\u95f4\u663e\u793a\u3002\u5f53\u7528\u6237\u79fb\u52a8SeekBar\u65f6\uff0c\u4f1a\u89e6\u53d1\u76f8\u540c\u7684\u65b9\u6cd5\u3002\u5f53\u7528\u6237\u505c\u6b62\u62d6\u52a8SeekBar\u65f6\uff0c\u4f1a\u89e6\u53d1onStopTrackingTouch\u65b9\u6cd5\uff0c\u5728\u8be5\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528seekTo\u65b9\u6cd5\u66f4\u65b0MediaPlayer\u5b9e\u4f8b\u4e0a\u7684\u6b4c\u66f2\u4f4d\u7f6e\u3002\u4e00\u65e6\u6b4c\u66f2\u64ad\u653e\u5b8c\u6210\uff0c\u6211\u4eec\u5c06SeekBar\u7684\u4f4d\u7f6e\u66f4\u65b0\u4e3a\u521d\u59cb\u4f4d\u7f6e\uff0c\u5e76\u6e05\u9664MediaPlayer\u5b9e\u4f8b\u3002\u6ca1\u6709\u97f3\u9891\u7684\u5e94\u7528\u7a0b\u5e8f\u8f93\u51fa\u5982\u4e0b\u6240\u793a\uff1a\u6559\u7a0b\u5230\u6b64\u7ed3\u675f\u3002\u60a8\u53ef\u4ee5\u4ece\u4e0b\u9762\u7684\u94fe\u63a5\u4e0b\u8f7d\u9879\u76ee\u5e76\u64ad\u653e\u6b4c\u66f2\u3002<\/p>\n<p>\u5b89\u5353\u5a92\u4f53\u64ad\u653e\u5668\u6b4c\u66f2\u793a\u4f8b<\/p>\n<p>GitHub\u9879\u76ee\u94fe\u63a5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5e26\u6709SeekBar\u7684\u5b89\u5353\u5a92\u4f53\u64ad\u653e\u5668\u7684\u6b4c\u66f2\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002 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