Android MediaStore检索视频并播放-白红宇

Android MediaStore检索视频并播放

阅读量：4036 次

发布时间：2019-05-24

本文共 5410 字，大约阅读时间需要 18 分钟。

布局文件：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent">

<listview android:id="@+id/listView"

android:layout_width="match_parent"

android:layout_height="wrap_content">

</listview>

</relativelayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent">

<imageview android:id="@+id/imageView"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

<textview android:id="@+id/textView"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

</textview></imageview></linearlayout>

Activity类

package com.zh_weir.videoplayer;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.widget.AdapterView.OnItemClickListener;

import java.io.File;

import java.util.ArrayList;

import com.zh_weir.videoplayer.VideoGalleryAdapter.videoviewinfo;

import android.content.Intent;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.provider.MediaStore;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ListView;

public class MainActivity extends Activity implements OnItemClickListener{

private ListView listView;

private Cursor cursor;

@SuppressLint("NewApi")

@SuppressWarnings("deprecation")

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

listView = (ListView) findViewById(R.id.listView);

/**

* 从MediaStore.Video.Thumbnail查询中获得的列的列表。

String[] thumbColumns = { MediaStore.Video.Thumbnails.DATA,

MediaStore.Video.Thumbnails.VIDEO_ID };

/**

* 从MediaStore.Video.Media查询中获得的列的列表。

String[] mediaColumns = { MediaStore.Video.Media._ID,

MediaStore.Video.Media.DATA, MediaStore.Video.Media.TITLE,

MediaStore.Video.Media.MIME_TYPE };

/**

* 在主查询中将选择所有在MediaStore中表示的视频

cursor = managedQuery(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,

mediaColumns, null, null, null);

ArrayList<videoviewinfo> videoRows = new ArrayList<videoviewinfo>();

if (cursor.moveToFirst()) {

do {

videoviewinfo newVVI = new videoviewinfo();

/**

* 将使用另一个查询为每个视频提取缩略图，而且这些数据块都将存储在VideoViewInfo对象中。

int id = cursor.getInt(cursor

.getColumnIndex(MediaStore.Video.Media._ID));

Cursor thumbCursor = managedQuery(

MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI,

thumbColumns, MediaStore.Video.Thumbnails.VIDEO_ID

+ "=" + id, null, null);

if (thumbCursor.moveToFirst()) {

newVVI.thumbPath = thumbCursor.getString(thumbCursor

.getColumnIndex(MediaStore.Video.Thumbnails.DATA));

}

newVVI.filePath = cursor.getString(cursor

.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));

newVVI.title = cursor.getString(cursor

.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));

newVVI.mimeType = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));

videoRows.add(newVVI);

} while (cursor.moveToNext());

}

listView.setAdapter(new VideoGalleryAdapter(this, videoRows));

listView.setOnItemClickListener(this);

}

/**

* 这个方法将从Cursor对象中提取所需的数据，点击一个item，将创建一个意图，以启动手机设备上默认的媒体播放器来播放该item视频。

@Override

public void onItemClick(AdapterView parent, View view, int position,

long id) {

if (cursor.moveToPosition(position)) {

int fileColumn = cursor

.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);

int mimeColumn = cursor

.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE);

String videoFilePath = cursor.getString(fileColumn);

String mimeType = cursor.getString(mimeColumn);

Intent intent = new Intent(android.content.Intent.ACTION_VIEW);

File newFile = new File(videoFilePath);

intent.setDataAndType(Uri.fromFile(newFile), mimeType);

startActivity(intent);

}

package com.zh_weir.videoplayer;

import java.util.ArrayList;

import android.content.Context;

import android.net.Uri;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

public class VideoGalleryAdapter extends BaseAdapter{

private Context context;

private ArrayList<videoviewinfo> videoRows;

LayoutInflater inflater;

public VideoGalleryAdapter(Context context,

ArrayList<videoviewinfo> videoRows) {

this.context = context;

this.videoRows = videoRows;

inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

@Override

public int getCount() {

return videoRows.size();

}

@Override

public Object getItem(int position) {

return null;

}

@Override

public long getItemId(int position) {

return 0;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

View videoRow = inflater.inflate(R.layout.list_item, null);

ImageView videoThumb = (ImageView) videoRow.findViewById(R.id.imageView);

if (videoRows.get(position).thumbPath != null) {

videoThumb.setImageURI(Uri.parse(videoRows.get(position).thumbPath));

}

TextView videoTitle = (TextView) videoRow.findViewById(R.id.textView);

videoTitle.setText(videoRows.get(position).title);

return videoRow;

}

static class videoviewinfo{

String filePath;

String mimeType;

String thumbPath;

String title;

}

转载地址：http://oyjdi.baihongyu.com/

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