├── .gitignore
├── .idea
├── encodings.xml
├── gradle.xml
├── misc.xml
├── modules.xml
├── runConfigurations.xml
└── vcs.xml
├── README.md
├── app
├── .gitignore
├── build.gradle
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── com
│ │ └── noob
│ │ └── videoscreen
│ │ └── ExampleInstrumentedTest.java
│ ├── main
│ ├── AndroidManifest.xml
│ ├── java
│ │ └── com
│ │ │ └── noob
│ │ │ └── videoscreen
│ │ │ └── MainActivity.java
│ └── res
│ │ ├── drawable-v24
│ │ └── ic_launcher_foreground.xml
│ │ ├── drawable
│ │ └── ic_launcher_background.xml
│ │ ├── layout
│ │ └── activity_main.xml
│ │ ├── mipmap-anydpi-v26
│ │ ├── ic_launcher.xml
│ │ └── ic_launcher_round.xml
│ │ ├── mipmap-hdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-mdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ └── values
│ │ ├── colors.xml
│ │ ├── strings.xml
│ │ └── styles.xml
│ └── test
│ └── java
│ └── com
│ └── noob
│ └── videoscreen
│ └── ExampleUnitTest.java
├── build.gradle
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
├── settings.gradle
└── 获取截图.gif
/.gitignore:
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8 | /captures
9 | .externalNativeBuild
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/README.md:
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1 | 最近要做一个为视频设置封面的功能，这里展示一下简单的demo。
2 |
3 | ## demo效果
4 | 这里直接将选取的视频某一时间的bitmap显示在视频下方。上面是视频，下面是所获取那一帧的截图。
5 |
6 | 
7 |
8 | ## 具体代码
9 | 这里的话主要是靠videoView来显示视频内容，seekBar来控制视频的进度,使用MediaMetadataRetriever来获取所选中进度的时间的视频画面。
10 |
11 | ### 布局代码
12 |
13 |
21 |
22 |
23 |
27 |
31 |
35 |
36 |
37 | ### 具体代码
38 |
39 | public class UploadActivity extends ActivitySupport {
40 |
41 | @BindView(R.id.vv_player)
42 | VideoView videoView;
43 | @BindView(R.id.sb_select)
44 | SeekBar sbVideo;
45 | @BindView(R.id.iv_head)
46 | ImageView ivHead;
47 |
48 | boolean isTouch = false;
49 | int totalTime;
50 | int currentTime;
51 | @Override
52 | protected int getLayoutResId() {
53 | return R.layout.activity_upload;
54 | }
55 |
56 | @Override
57 | protected void initData() {
58 | String mp4Path = Environment.getExternalStorageDirectory().getPath() + "/qwwz.mp4";
59 | MediaMetadataRetriever mmr = new MediaMetadataRetriever();
60 | mmr.setDataSource(mp4Path);
61 |
62 | videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
63 | @Override
64 | public void onPrepared(MediaPlayer mp) {
65 | totalTime = videoView.getDuration();//毫秒
66 | }
67 | });
68 | sbVideo.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
69 | @Override
70 | public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
71 | if(isTouch){
72 | currentTime = (int)(((float) progress / 100) * totalTime);
73 | videoView.seekTo(currentTime);
74 | }
75 | }
76 |
77 | @Override
78 | public void onStartTrackingTouch(SeekBar seekBar) {
79 | isTouch = true;
80 | }
81 |
82 | @Override
83 | public void onStopTrackingTouch(SeekBar seekBar) {
84 | isTouch = false;
85 | //获取第一帧图像的bitmap对象 单位是微秒
86 | Bitmap bitmap = mmr.getFrameAtTime((long) (currentTime * 1000), OPTION_PREVIOUS_SYNC);
87 | ivHead.setImageBitmap(bitmap);
88 | }
89 | });
90 | videoView.setVideoPath(mp4Path);
91 | }
92 |
93 | }
94 |
95 |
96 | ## 问题
97 | 很简单，这样就完成了gif所展示的内容。
98 | **但是也有明显不足之处**：seekBar的progress范围是0 - 100也就是视频获取截图的**最小时间单位是视频总时间长度 / 100**，这样的单位是满足不了长视频的截图要求的,这里还需要优化,可以通过一个自定义view来实现。
99 |
100 | Demo地址：[https://github.com/JavaNoober/VideoScreen](https://github.com/JavaNoober/VideoScreen)
101 |
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/app/.gitignore:
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1 | /build
2 |
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/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 26
5 | defaultConfig {
6 | applicationId "com.noob.videoscreen"
7 | minSdkVersion 14
8 | targetSdkVersion 26
9 | versionCode 1
10 | versionName "1.0"
11 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
12 | }
13 | buildTypes {
14 | release {
15 | minifyEnabled false
16 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
17 | }
18 | }
19 | }
20 |
21 | dependencies {
22 | implementation fileTree(dir: 'libs', include: ['*.jar'])
23 | implementation 'com.android.support:appcompat-v7:26.1.0'
24 | implementation 'com.android.support.constraint:constraint-layout:1.0.2'
25 | testImplementation 'junit:junit:4.12'
26 | androidTestImplementation 'com.android.support.test:runner:1.0.1'
27 | androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
28 | }
29 |
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/app/proguard-rules.pro:
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1 | # Add project specific ProGuard rules here.
2 | # You can control the set of applied configuration files using the
3 | # proguardFiles setting in build.gradle.
4 | #
5 | # For more details, see
6 | # http://developer.android.com/guide/developing/tools/proguard.html
7 |
8 | # If your project uses WebView with JS, uncomment the following
9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | # public *;
13 | #}
14 |
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 |
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile
22 |
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/app/src/androidTest/java/com/noob/videoscreen/ExampleInstrumentedTest.java:
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1 | package com.noob.videoscreen;
2 |
3 | import android.content.Context;
4 | import android.support.test.InstrumentationRegistry;
5 | import android.support.test.runner.AndroidJUnit4;
6 |
7 | import org.junit.Test;
8 | import org.junit.runner.RunWith;
9 |
10 | import static org.junit.Assert.*;
11 |
12 | /**
13 | * Instrumented test, which will execute on an Android device.
14 | *
15 | * @see Testing documentation
16 | */
17 | @RunWith(AndroidJUnit4.class)
18 | public class ExampleInstrumentedTest {
19 | @Test
20 | public void useAppContext() throws Exception {
21 | // Context of the app under test.
22 | Context appContext = InstrumentationRegistry.getTargetContext();
23 |
24 | assertEquals("com.noob.videoscreen", appContext.getPackageName());
25 | }
26 | }
27 |
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/app/src/main/AndroidManifest.xml:
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/app/src/main/java/com/noob/videoscreen/MainActivity.java:
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1 | package com.noob.videoscreen;
2 |
3 | import android.graphics.Bitmap;
4 | import android.media.MediaMetadataRetriever;
5 | import android.media.MediaPlayer;
6 | import android.os.Environment;
7 | import android.support.v7.app.AppCompatActivity;
8 | import android.os.Bundle;
9 | import android.widget.ImageView;
10 | import android.widget.SeekBar;
11 | import android.widget.VideoView;
12 |
13 | public class MainActivity extends AppCompatActivity {
14 | VideoView videoView;
15 | SeekBar sbVideo;
16 | ImageView ivHead;
17 |
18 | boolean isTouch = false;
19 | int totalTime;
20 | int currentTime;
21 | @Override
22 | protected void onCreate(Bundle savedInstanceState) {
23 | super.onCreate(savedInstanceState);
24 | setContentView(R.layout.activity_main);
25 | videoView = findViewById(R.id.vv_player);
26 | sbVideo = findViewById(R.id.sb_select);
27 | ivHead = findViewById(R.id.iv_head);
28 | initData();
29 | }
30 |
31 | protected void initData() {
32 | String mp4Path = Environment.getExternalStorageDirectory().getPath() + "/qwwz.mp4";
33 | final MediaMetadataRetriever mmr = new MediaMetadataRetriever();
34 | mmr.setDataSource(mp4Path);
35 |
36 | videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
37 | @Override
38 | public void onPrepared(MediaPlayer mp) {
39 | totalTime = videoView.getDuration();//毫秒
40 | }
41 | });
42 | sbVideo.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
43 | @Override
44 | public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
45 | if(isTouch){
46 | currentTime = (int)(((float) progress / 100) * totalTime);
47 | videoView.seekTo(currentTime);
48 | }
49 | }
50 |
51 | @Override
52 | public void onStartTrackingTouch(SeekBar seekBar) {
53 | isTouch = true;
54 | }
55 |
56 | @Override
57 | public void onStopTrackingTouch(SeekBar seekBar) {
58 | isTouch = false;
59 | //获取第一帧图像的bitmap对象 单位是微秒
60 | Bitmap bitmap= mmr.getFrameAtTime((long) (currentTime * 1000), MediaMetadataRetriever
61 | .OPTION_PREVIOUS_SYNC);
62 | ivHead.setImageBitmap(bitmap);
63 | }
64 | });
65 | videoView.setVideoPath(mp4Path);
66 | }
67 |
68 | @Override
69 | protected void onStart() {
70 | super.onStart();
71 | }
72 |
73 |
74 | @Override
75 | protected void onStop() {
76 | super.onStop();
77 | videoView.stopPlayback();
78 | }
79 | }
80 |
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