Question

我创建了一个包含网址的列表视图，例如abc：554 / user = admin＆amp; password =＆amp; channel = 1

当我点击listview时，url会被传递到下一个类并将其用于setDataSource。但是我遇到的问题是setDataSource没有检测到url。我试图对url进行硬编码并使用Toast来在尝试连接时显示url并且它正常工作。但是当传递字符串时，没有任何反应。这是我的代码

第一堂课试图传递字符串

OnItemClickListener getURLOnItemClickListener
        = new OnItemClickListener(){

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
                            long id) {
        // TODO Auto-generated method stub
        String clickedFile = (String) parent.getItemAtPosition(position);
        getURL(clickedFile);
    }

};

void getURL(final String file){
    if (clickAble == true){
        FileInputStream fis;
        String content = "";
        try {
            fis = openFileInput(file);
            byte[] input = new byte[fis.available()];
            while (fis.read(input) != -1) {}
            content += new String(input);
            //Toast.makeText(getBaseContext(),content,Toast.LENGTH_SHORT).show();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        Intent i = new Intent(addressActivity.this, liveActivity.class);
        String strName = content.toString();
        i.putExtra("urlAddress", strName);
        startActivity(i);
    }
}

设置传递字符串的第二个类

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_live);
    final String newString;
    if (savedInstanceState == null) {
        Bundle extras = getIntent().getExtras();
        if(extras == null) {
            newString = null;
        } else {
            newString = extras.getString("urlAddress");
        }
    } else {
        newString = (String) savedInstanceState.getSerializable("urlAddress");
    }
    urlLink = "rtsp://" + newString + "&stream=1.sdp?";
    videoPlay();
}
void videoPlay(){
    mPlayer1 = new MediaPlayer();
    mCallback1 = new SurfaceHolder.Callback() {
        @Override
        public void surfaceCreated(SurfaceHolder surfaceHolder) {
            try {
                mPlayer1.setDataSource(urlLink);
                mPlayer1.setDisplay(surfaceHolder);
                mPlayer1.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mediaPlayer) {
                        mPlayer1.start();
                        Toast.makeText(getBaseContext(),"Connecting...",Toast.LENGTH_LONG).show();
                    }
                });
                mPlayer1.prepareAsync();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        @Override
        public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
        }
        @Override
        public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
            mPlayer1.release();
        }
    };
    final SurfaceView surfaceView1 =
            (SurfaceView) findViewById(R.id.surfaceView1);
    // Configure the Surface View.
    surfaceView1.setKeepScreenOn(true);
    // Configure the Surface Holder and register the callback.
    SurfaceHolder holder1 = surfaceView1.getHolder();
    holder1.addCallback(mCallback1);
    holder1.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

Answer 1

我设法找到了答案，这很荒谬简单。在第二类围绕这些代码行顶部

final String newString;
if (savedInstanceState == null) {
    Bundle extras = getIntent().getExtras();
    if(extras == null) {
        newString = null;
    } else {
        newString = extras.getString("urlAddress");
    }
} else {
    newString = (String) savedInstanceState.getSerializable("urlAddress");
}
urlLink = "rtsp://" + newString + "&stream=1.sdp?";
videoPlay();
}

我做的只是改变

urlLink = "rtsp://" + newString + "&stream=1.sdp?";

到

urlLink = "rtsp://" + newString.toString().trim() + "&stream=1.sdp?";

只是添加toString（）不起作用，所以我尝试添加trim（）并且它有效。如果有人可以向我解释为什么这项工作会非常感激

未检测到传递的字符串中的setDataSource

1 个答案: