在Android的正确传递数据？ [英] Passing data properly in android?

问题描述

我有这在我的第一个活动：

I have this in my first activity:

    private AdapterView.OnItemClickListener _itemClickLis = new OnItemClickListener() 
    {
    public void onItemClick(AdapterView<?> parent, View v, int position, long id) 
    {
        // Now we want to actually get the data location of the file
        String [] proj={MEDIA_DATA};
        // We request our cursor again
        _cursor = managedQuery(_contentUri,
                proj, // Which columns to return
                null,       // WHERE clause; which rows to return (all rows)
                null,       // WHERE clause selection arguments (none)
                null); // Order-by clause (ascending by name)
        // We want to get the column index for the data uri
        int count = _cursor.getCount();
        //
        _cursor.moveToFirst();
        //
        _columnIndex = _cursor.getColumnIndex(MEDIA_DATA);
        // Lets move to the selected item in the cursor
        _cursor.moveToPosition(position);
        // And here we get the filename
        String filename = _cursor.getString(_columnIndex);
        //*********** You can do anything when you know the file path :-)
        showToast(filename);

        Intent i = new Intent("com.ave.EDITORSCREEN");
        i.putExtra("mnt/sdcard-ext", _ID);
        startActivity(i);

    }

这是不是完整code，但作为全code从SD卡收集所有的视频​​缩略图，并显示他们沿着他们的道路的（在祝酒词）。我希望能够点击缩略图，并传递到下一个活动的数据进行播放，停止，暂停，等你能看到我在第一个活动传递的数据：

This is not the full code, but as the full code gathers all the video thumbnails from the sd card and displays them along with their path's (in toasts). I want to be able to click a thumbnail and have the data passed on to the next activity to be played, stopped, paused, etc. You can see where I have passed the data in the first activity:

public class Editor extends Activity {
ImageButton video1;
int isClicked = 0;
ImageButton audio;
int isClicked1 = 0;

    @Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.editor);

    video1 = (ImageButton) findViewById(R.id.video1);
    video1.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            if (isClicked == 0) {
                video1.setImageResource(R.drawable.video_pressed);
                isClicked = 1;
            } else {
                video1.setImageResource(R.drawable.video1);
                isClicked = 0;
            }
          }
     });

    audio = (ImageButton) findViewById(R.id.audio);
    audio.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            if (isClicked1 == 0) {
                audio.setImageResource(R.drawable.audio_pressed);
                isClicked1 = 1;
            } else {
                audio.setImageResource(R.drawable.audio);
                isClicked1 = 0;
            }
          }
      });
    }
}

我想象得到的数据，我将需要把

I imagine to get the data I will need to put

String data = getIntent().getStringExtra("mnt/sdcard-ext");

但是，在onCreate方法？或者是这甚至得到传递数据的正确方法？最后一点我怎么能我可以播放视频？是否有某种code为说一个视频播放器？如果是的话我会在哪里放置这在我的最后一个活动？

But where the onCreate method? Or is this even the right way to get the passed data? And lastly how can I can I play the video? Is there some sort of code for say a video player? If so where would I place this in my final activity?

推荐答案

您不必做在的onCreate（）方法，但为什么不呢？你还有什么地方把它？

You do not have to do it in the onCreate() method, but why not? Where else would you put it?

如果你正在寻找任何类型的文档，我会建议您检查出 Android开发者的Java（Android版）文件。该 Android开发者有一个伟大的网站在一般情况下，所有关于机器人。我认为，一个良好的开端与Android 音频/视频是这里。

If you are looking for any sort of documentation, I would recommend checking out the Android Developers Java(Android)Doc. The Android Developers have a great site in general, all about Android. I think a good place to start with Android Audio/Video is here.

一般情况下，你会设置你的MediaPlayer界面的布局（播放/暂停按钮和视图）的的onCreate（），并设置你的点击/触摸听众是当接收输入时执行。

Generally, you would set up the layout of your MediaPlayer interface (Play/Pause buttons and views) in onCreate() and also setup your click/touch listeners to be executed when input is received.

有关第一个编程课程，它看起来像你正在做pretty好。祝你好运！

For a first programming course, it looks like you are doing pretty well. Good Luck!

这篇关于在Android的正确传递数据？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！