hzuapps#2 hzuapps#131 第二次作业

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903118/MyAdapter.java

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+package edu.hzuapps.androidlab.Net1414080903118;
+
+import android.content.Context;
+import android.graphics.BitmapFactory;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.example.administrator.video.R;
+
+import java.io.File;
+import java.util.List;
+
+/**
+ * Created by Administrator on 2017/5/7.
+ */
+
+public class MyAdapter extends BaseAdapter {
+
+    Context context;
+    List<VideoInfo> list;
+
+    public MyAdapter(Context context, List<VideoInfo> list) {
+        this.context = context;
+        this.list = list;
+    }
+
+    @Override
+    public int getCount() {
+        return list.size();
+    }
+
+    @Override
+    public Object getItem(int position) {
+        return list.get(position).getPath();
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return position;
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        Holder holder = null;
+        if (convertView == null) {
+            convertView = LayoutInflater.from(context).inflate(R.layout.menu_item, null);
+            holder = new Holder();
+            holder.iv = (ImageView) convertView.findViewById(R.id.iv_item);
+            holder.tvTitle = (TextView) convertView.findViewById(R.id.tv_item_title);
+            holder.tvDuration = (TextView) convertView.findViewById(R.id.tv_item_duration);
+            convertView.setTag(holder);
+        } else {
+            holder = (Holder) convertView.getTag();
+        }
+        holder.tvTitle.setText(list.get(position).getTitle());
+        long duration = Long.parseLong(list.get(position).getDuration());
+        duration = duration / 1000;
+        StringBuilder builder = new StringBuilder("时长：");
+        int hour = (int) (duration / 3600);
+        builder.append(hour).append("时");
+        int minuter = (int) ((duration % 3600) / 60);
+        builder.append(minuter).append("分");
+        int second = (int) (duration % 60);
+        builder.append(second).append("秒");
+        holder.tvDuration.setText(builder.toString());
+        if(list.get(position).getThumbPath()!=null){
+            File file = new File(list.get(position).getThumbPath());
+            holder.iv.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
+        }
+        return convertView;
+    }
+
+    private class Holder {
+        TextView tvTitle;
+        TextView tvDuration;
+        ImageView iv;
+    }
+
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903118/Net1414080903118MainActivity.java

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+package edu.hzuapps.androidlab.Net1414080903118;
+
+import android.content.Intent;
+import android.database.Cursor;
+import android.provider.MediaStore;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ListView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.example.administrator.video.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Net1414080903118MainActivity extends AppCompatActivity {
+
+    private static final String TAG = "MainActivity";
+    Cursor cursor;
+    ListView lv;
+
+    public List<VideoInfo> sysVideoList = new ArrayList<>();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_net1414809003118_main);
+        lv= (ListView) findViewById(R.id.lv);
+        setVideoList();
+        final MyAdapter adapter=new MyAdapter(this,sysVideoList);
+        lv.setAdapter(adapter);
+        lv.setEmptyView(LayoutInflater.from(this).inflate(R.layout.empty_list,null));
+        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+           @Override
+           public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+               Intent intent=new Intent(Net1414080903118MainActivity.this,Net1414080903118PlayActivity.class);
+               intent.putExtra("path",(String)adapter.getItem(position));
+               startActivity(intent);
+           }
+       });
+    }
+
+    private void setVideoList() {
+        // MediaStore.Video.Thumbnails.DATA:视频缩略图的文件路径
+        String[] thumbColumns = {MediaStore.Video.Thumbnails.DATA,
+                MediaStore.Video.Thumbnails.VIDEO_ID};
+
+        // MediaStore.Video.Media.DATA：视频文件路径；
+        // MediaStore.Video.Media.DISPLAY_NAME : 视频文件名，如 testVideo.mp4
+        // MediaStore.Video.Media.TITLE: 视频标题 : testVideo
+        String[] mediaColumns = {MediaStore.Video.Media._ID,
+                MediaStore.Video.Media.DATA, MediaStore.Video.Media.TITLE,
+                MediaStore.Video.Media.MIME_TYPE,
+                MediaStore.Video.Media.DURATION,
+                MediaStore.Video.Media.DISPLAY_NAME};
+
+        cursor = managedQuery(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                mediaColumns, null, null, null);
+
+        if (cursor == null) {
+            Toast.makeText(Net1414080903118MainActivity.this, "没有找到可播放视频文件", Toast.LENGTH_LONG).show();
+            return;
+        }
+        if (cursor.moveToFirst()) {
+            do {
+                VideoInfo info = new VideoInfo();
+                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()) {
+                    info.setThumbPath(thumbCursor.getString(thumbCursor
+                            .getColumnIndex(MediaStore.Video.Thumbnails.DATA)));
+                }
+                info.setPath(cursor.getString(cursor
+                        .getColumnIndexOrThrow(MediaStore.Video.Media.DATA)));
+                info.setTitle(cursor.getString(cursor
+                        .getColumnIndexOrThrow(MediaStore.Video.Media.TITLE)));
+                info.setDisplayName(cursor.getString(cursor
+                        .getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME)));
+                info.setDuration(cursor.getString(cursor
+                        .getColumnIndexOrThrow(MediaStore.Video.Media.DURATION)));
+                Log.d(TAG, "DisplayName:" + info.getDisplayName());
+                info.setMimeType(cursor
+                        .getString(cursor
+                                .getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE)));
+                String displayName=info.getDisplayName();
+                String s=displayName.substring(displayName.indexOf(".")+1);
+                if(s.equals("mp4")||s.equals("3pg"))
+                    sysVideoList.add(info);
+            } while (cursor.moveToNext());
+        }
+    }
+
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903118/Net1414080903118PlayActivity.java

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+package edu.hzuapps.androidlab.Net1414080903118;
+
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.MediaController;
+import android.widget.VideoView;
+
+import com.example.administrator.video.R;
+
+import java.io.File;
+
+public class Net1414080903118PlayActivity extends AppCompatActivity {
+
+    VideoView videoView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_net1414080903118_play);
+        getSupportActionBar().hide();
+        String path= getIntent().getStringExtra("path");
+        videoView= (VideoView) findViewById(R.id.video);
+        File file=new File(path);
+        Log.d("path",file.getAbsolutePath());
+        videoView.setVideoPath(file.getAbsolutePath());
+        MediaController mediaController=new MediaController(this);
+        mediaController.setMediaPlayer(videoView);
+        videoView.setMediaController(mediaController);
+        if(!videoView.isPlaying()){
+            videoView.start();
+        }
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if(getRequestedOrientation()!= ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){
+            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
+        }
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        if(videoView!=null){
+            videoView.suspend();
+        }
+    }
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903118/VideoInfo.java

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+package edu.hzuapps.androidlab.Net1414080903118;
+
+/**
+ * Created by Administrator on 2017/5/7.
+ */
+public class VideoInfo {
+
+    String thumbPath;
+    String path;
+    String title;
+    String mimeType;
+    String displayName;
+    String duration;
+
+    public String getDuration() {
+        return duration;
+    }
+
+    public void setDuration(String duration) {
+        this.duration = duration;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public void setDisplayName(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public String getPath() {
+        return path;
+    }
+
+    public void setPath(String path) {
+        this.path = path;
+    }
+
+    public String getMimeType() {
+        return mimeType;
+    }
+
+    public void setMimeType(String mimeType) {
+        this.mimeType = mimeType;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getThumbPath() {
+        return thumbPath;
+    }
+
+    public void setThumbPath(String thumbPath) {
+        this.thumbPath = thumbPath;
+    }
+
+    @Override
+    public String toString() {
+        return thumbPath+"-"+path+"-"+title+"-"+mimeType+"-"+displayName+"\n";
+    }
+}

AndroidLabs/app/src/main/res/layout/activity_net1414080903118_play.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <VideoView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/video"/>
+</RelativeLayout>

AndroidLabs/app/src/main/res/layout/activity_net1414809003118_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <ListView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/lv"/>
+
+
+</RelativeLayout>

AndroidLabs/app/src/main/res/layout/empty_list.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:textSize="18sp"
+    android:padding="50dp"
+    android:text="未找到符合格式的視頻文件，本播放器仅支持3pg,mp4格式的视频">
+
+</TextView>

AndroidLabs/app/src/main/res/layout/menu_item.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="15dp">
+
+    <ImageView
+        android:src="@mipmap/ic_launcher"
+        android:layout_width="70dp"
+        android:layout_height="80dp"
+        android:id="@+id/iv_item"/>
+
+    <LinearLayout
+        android:layout_marginLeft="15dp"
+        android:layout_width="0dp"
+        android:layout_weight="1"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+        <TextView
+            android:id="@+id/tv_item_title"
+            android:textSize="16sp"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+        <TextView
+            android:layout_marginTop="10dp"
+            android:id="@+id/tv_item_duration"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textSize="14sp"/>
+
+
+    </LinearLayout>
+
+</LinearLayout>