小弟我的第一个Android 多媒体的Demo

我的第一个Android 多媒体的Demo

作者：wuhua
;IJj*SB(A'Tt3空间：htt://wuhua.3geye.netAndroid J2ME $_c+q"l5AH
转载请保留上面的信息（请尊重知识产品）谢谢Android J2ME 8l9Hb^]~u
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SD3]3package com.ucweb.player;Android J2ME d4~i(k?j:Oz|

*Fu`%reo"m3import java.io.IOException;
c%`~'WW&vM3Android J2ME 5?-P1J
kc#V{
import android.app.Activity;Android J2ME #H)bYg2WgJ
import android.content.Context;
0lSnX4rU[3import android.graphics.PixelFormat;
O(LaiSa3import android.media.MediaPlayer;Android J2ME I5AWdt'u'o
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import android.media.MediaPlayer.OnBufferingUpdateListener;Android J2ME ,ED(kT)l'J"]
import android.media.MediaPlayer.OnCompletionListener;Android J2ME s*Zh;PKn)Fh}
import android.media.MediaPlayer.OnErrorListener;Android J2ME +g`&U9eCU
import android.os.Bundle;
Y6L7K2Z2a3import android.util.Log;Android J2ME b(n+Fd0?2j)?E;[
import android.view.Menu;Android J2ME Z_G;t!W
import android.view.Surface;Android J2ME 3g*U4y8aSm(o
import android.view.SurfaceHolder;Android J2ME Up5sB|+zW;o
import android.view.SurfaceView;Android J2ME ,b;f/?3H5eP]W
import android.view.Window;
(?ac+qu-RP6j6\~3import android.view.Menu.Item;
?._2]&{i)G3
Kkn(x#C$DNDA3public class VideoPlayer extends Activity implements OnErrorListener,
|Pc(L/n3??????????????? OnBufferingUpdateListener, OnCompletionListenerAndroid J2ME mW}3D,t4[r
??????? {
l9mYK(GLc3??????? private static final String TAG = "PlayVideo";Android J2ME oV8z#@
?fb)f?l9m
Android J2ME pl^ kR5_
??????? private static final int PLAY_VIDEO = Menu.FIRST + 1;Android J2ME *c(tKYvY#p g
??????? private static final int PLAY_MP3 = Menu.FIRST + 2;

o
ah1}8OPi3??????? private static final int STOP_PLAY_ID = Menu.FIRST + 4;
:vZ7y{m
E3
]#[6H:e?3??????? private MediaPlayer mp;
M?qu-|g8s1hgf3
ut7~L,?q/r3??????? private Preview mPreview;
1{R^{omnX3Android J2ME T3PG7`1\l
??????? /** Called when the activity is first created. */
D)rFBrt1V!Tf3??????? @Override
5|Md2dj(iJ^3??????? public void onCreate(Bundle icicle)Android J2ME yV ^;s9['V
??????? {
BnO(CC3??????????????? super.onCreate(icicle);Android J2ME !G.v%t!xI0F
??????????????? Log.v(TAG, "onCreate: ===> ");Android J2ME "G6ud6v?s
??????????????? requestWindowFeature(Window.FEATURE_NO_TITLE);Android J2ME q
C~/d.fR
??????????????? getWindow().setFormat(PixelFormat.TRANSPARENT);
wXO3dZhF3
s6\j.F(TL8z3??????????????? mPreview = new Preview(this);
;[j?m(My3??????????????? setContentView(mPreview);Android J2ME K*`sF
]^
??????? }
T0X3licaj3
4W/HMF,g(y3??????? private void playVideo()
9@l??~zF
B.P6F3??????? {
KNs3C[FR3??????????????? try
~
R+b1Amy3??????????????? {
9hP,E!q7\:c,LTy3??????????????????????? SurfaceView view = new SurfaceView(this);
N(f6` x5T?1dW3??????????????????? Surface surface = view.getHolder().getSurface();
;iK W&Bej;h&mSp3??????????????????????? setContentView(view);
}]N2I
?&Hhc3
$rqB%S6g"gw)p5h!Z%Ne-R3??????????????????????? Log.v(TAG, "height: " + mPreview.getHeight());
6gHPe'`w5pYU|3??????????????????????? Log.v(TAG, "width: " + mPreview.getWidth());
fB
RhT6M3??????????????????????? mp = MediaPlayer.create(this, R.raw.mp3);Android J2ME 7UD#d2y9bzG
Android J2ME R3X8N,}0hn1H?PMW
??????????????????????? mp.setOnErrorListener(this);
$`]HbT-k@(i%@5Oa3??????????????????????? mp.setDisplay(mPreview.getHolder().getSurface());Android J2ME HO\8Fw-A
??????????????????????? mp.prepare();
g|`OP7F8E3??????????????????????? Log.v(TAG, "Duration:? ===>" + mp.getDuration());Android J2ME :v4gu`Wdf&c
??????????????????????? mp.start();Android J2ME |2kV2h w
??????????????? }
'p4|7q+}{V{3??????????????? catch (Exception e)
4aF-`|,XsWnp3??????????????? {
4k9@Foxeb@?\3??????????????????????? //e.printStackTrace();
~}_1e{&n!k3??????????????????????? Log.e(TAG, "error: " + e.getMessage());
iRK-a9y3??????????????????????? stopPlay();Android J2ME 5oj;SXCr
??????????????? }Android J2ME H$z.~i4]+f$\.n
??????? }Android J2ME M$[^#s+U:u

dPuh?O{3??????? private void playMp3() throws IOExceptionAndroid J2ME ?L*Yv hc*N7Q
??????? {Android J2ME L@P7q&O
??????????????? mp = MediaPlayer.create(this, R.raw.mp3);
'Mn5aqPm"`3??????????????? mp.prepare();
%M#~]m'BfO3??????????????? Log.v(TAG, "Duration: ===>" + mp.getDuration());
o\YU]NUH3??????????????? mp.start();Android J2ME G"T.kRo?m5q/u7C+R,X
??????? }
*I[%zFL7u3Android J2ME 4dJ~5_8CyP(JT+Rp;k
??????? private void stopPlay() {Android J2ME -a9]9mcf|
??????????????? if (mp != null) {Android J2ME rw|$dIG"]!i1Ap(@
??????????????????????? mp.stop();Android J2ME :~-q?lT(GsA-Y
??????????????????????? mp.release();Android J2ME a{;r:G@
??????????????? }Android J2ME F%H@'D9Zb
??????? }Android J2ME ?g;{)\OB5C4`u
Android J2ME $?"z,Ww\E
??????? @Override
9z
m?A,A?f:f3??????? public boolean onCreateOptionsMenu(Menu menu)Android J2ME :F*OM#N(yj
??????? {
En1Zj1x"b-g9NT3??????????????? boolean result = super.onCreateOptionsMenu(menu);Android J2ME ^i6tOO8c
??????????????? menu.add(0, PLAY_MP3,"MP3");
${O.]L F$Ua3??????????????? menu.add(1, PLAY_VIDEO, "MP3");
c0aM!mv?u+`3~3??????????????? menu.add(1, STOP_PLAY_ID, "MP3");Android J2ME %{ef)]FRMi
??????????????? return result;
7I:xU7X(R5Q(M3??????? }Android J2ME 9[dS9H`(K

9c%ETa5R3??????? @OverrideAndroid J2ME `
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??????? public boolean onOptionsItemSelected(Item item)Android J2ME QX
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??????? {Android J2ME w{F|We
??????????????? Log.v(TAG, "option: " + item.getId());
%NM z?7x#l$R"O/J3??????????????? switch (item.getId()) {Android J2ME Cq&?-\`F
??????????????? case PLAY_MP3:
,U:\T)?P2gB3?????????????? ??? ?try{
`-QH^S G3H2Z%k3??????????????????????? playMp3();
2c!N'jJ|@d3??????????????? }catch(Exception e){
a$YQ)M3\3??????????????? }
|IwoWtB.r3??????????????????????? break;Android J2ME z,e#@%k@
??????????????? case PLAY_VIDEO:

U)wqjP?iY%R3??????????????????????? playVideo();Android J2ME )jg"]w9\ M
??????????????????????? break;
J
DO`_\Q??"E"e*}.N)V3??????????????? case STOP_PLAY_ID:Android J2ME X+~,H,w;B}F3dG4}V
??????????????????????? stopPlay();Android J2ME jM)T'P
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??????????????????????? break;
N#Bp,X7o?j9T8]T3??????????????? }Android J2ME .a8Et1e-gH
??????????????? return super.onOptionsItemSelected(item);Android J2ME GI9rW@Z
??????? }Android J2ME v|nG6tN+t#lG

W \2CRe!K8X3??????? @Override
*O'n?u?@ Wjn3??? protected boolean isFullscreenOpaque()Android J2ME `!jC8pT'X
??????? {Android J2ME -W3G0pXu&@;E1J
??????????? // Our main window is set to translucent, but we know that weAndroid J2ME -C1KI*X
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//will
O?` yc-\3??????????? // fill it with opaque data. Tell the system that so it canAndroid J2ME dEN^?
//performAndroid J2ME Q*b
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??????????? // some important optimizations.Android J2ME %u_#PBN-?bFTI
??????????? return false;
l8V)W^GbM-~3??????? }Android J2ME [wmDC1l-u"U,N
Android J2ME rYV.IV xbO6ONd
??????? @Override
~nQ9kP3??????? protected void onResume() {
&^ R|
fs;Z
J8{+[wjr3??????????????? // Because the CameraDevice object is not a shared resource,
l5sfi}.sJ*u3??????????????? // it's very important to release it when the activity is paused.Android J2ME #OLT~G-C+k
??????????????? super.onResume();
^d#@X}3??????????????? //??? mPreview.resume();Android J2ME 6e-_D M/m:r
q
??????? }
1`e@YW3
!iHR.YJVbK3??????? @Override
9{p?hQ:\3b"uL3??????? protected void onPause() {Android J2ME
lK(H-L$cc3V'Z4}f
??????????????? // Start Preview again when we resume.Android J2ME loe"C0G/B'? I(E)`
??????????????? super.onPause();
[RLq.s4}a3??????????????? //??? mPreview.pause();Android J2ME ZO N3iF }9],D
??????? }Android J2ME 3KT?a1wt7h
Android J2ME ]E5i?ga/`6Qn
??????? public void onError(MediaPlayer mediaPlayer, int what, int extra) {
Q6}n`&|3??????????????? Log.e(TAG, "onError--->?? what:" + what + "??? extra:" + extra);Android J2ME g8}m#X*Pf
??????????????? if (mediaPlayer != null) {
Nui ^x2Ls'x3??????????????????????? mediaPlayer.stop();Android J2ME ?W?_BON%N~
??????????????????????? mediaPlayer.release();Android J2ME {l5BeAIh
??????????????? }
R!C'KE8m,M4`:U }3??????? }Android J2ME s3d"A1Bo%gWV
Android J2ME %C~8@#K1`HF0e7c
??????? public void onBufferingUpdate(MediaPlayer arg0, int percent) {Android J2ME 1}8vy#}1BxP;t
??????????????? Log.d(TAG, "onBufferingUpdate--->?? percent:" + percent);Android J2ME IlH
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??????? }Android J2ME ({!ba)O;bC?j
Android J2ME ?}.w2y?}'[l$^8Z
??????? public void onCompletion(MediaPlayer arg0) {Android J2ME L#F"WYPj\O$X
??????????????? Log.d(TAG, "onCompletion--->?? finished");Android J2ME +f1CO9j*gg
??????? }Android J2ME 2a1n)Vr\(|O4sNN

5g$Ek1?]asr3}Android J2ME
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J;q0a;_0H5g-F3class Preview extends SurfaceView implements SurfaceHolder.Callback {Android J2ME q,p?M,NNB2d9i%_jeW
??????? SurfaceHolder mHolder;Android J2ME $Jo4v,[3a7G
??????? private boolean mHasSurface;
F"iw+h*|!Nu2UoR3Android J2ME ZD&k,j'm-qs|"K+F
??????? Preview(Context context) {Android J2ME tnQ,z i
??????????????? super(context);
OGrE}ia3
0n-@7y E/f5q-?3??????????????? mHolder = getHolder();
z%sH|([`+F,c5r"f3??????????????? mHolder.addCallback(this);
7_Tf3kY\CK3??????????????? mHasSurface = false;
X+m[lVA?g3
S0??iz;M.d Q3??????????????? mHolder.setFixedSize(320, 240);Android J2ME
e$K1\!B'nA
??????????????? //mHolder.setFixedSize(192, 242);
Q1f/@\|u?b/r3??????? }
/k8nC'pr3Android J2ME tk1b|%mI4?9ep
??????? public void surfaceCreated(SurfaceHolder holder) {
g*tu(Nr@'AC$q3??????????????? // The Surface has been created, start our main acquisition thread.
~*x%@+`%_"l
s3??????????????? mHasSurface = true;
AC3^e"^;l;fc3?????????????? // return true;
3_#c2Qx5?3??????? }
9iBn-d,e1mb3Android J2ME [kB?s,O |
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??????? public void surfaceDestroyed(SurfaceHolder holder) {Android J2ME /Y"H?^,t~#hb
??????????????? // Surface will be destroyed when we return. Stop the preview.
?k/O4d)yP3t3??????????????? mHasSurface = false;Android J2ME (H4H+P!`yZ:[3Rv^
??????? }
lRHC7Bfb3Android J2ME Sh$?nE*XR!W2F&w
??????? public void surfaceChanged(SurfaceHolder holder, int format, int w,

|XoI6sV2j6s3int h) {Android J2ME -|V[|6qx,U
??? // Surface size or format has changed. This should not happen inAndroid J2ME Uo'Xq9W2_mW~d
//thisAndroid J2ME .d.DD%Z1iu
??? // example.
Z&S`Z+Y,]}p8tn3}}
Ys
Z6Sr+z3Android J2ME e;oomc?@SWq[
现在对这个东西还进行摸索阶段不知道他有没有提供对流媒体的支持。如果可以直接支持流媒体的话。那真是太好了。这样就可以用java来写流媒体。 继续研究Android J2ME T?:^?ZE6N"}

1 楼 lordhong 2008-06-01   支持一下, 貌似目前没有对流媒体的支持, 最大media文件size是1MB左右.
大家多摸索摸索... 2 楼 lijinyan3000 2008-06-02   收藏一下。 3 楼 wuhua 2008-06-02   lordhong 写道支持一下, 貌似目前没有对流媒体的支持, 最大media文件size是1MB左右.
大家多摸索摸索...
小弟我在研究这块东西，不过发现一直不成功。老出错。发现网络对这块也没有比较深入的研究，看了MideaPlayer，那些APIs也是少的可怜，比较简单。
4 楼 wuhua 2008-06-06   在下试验过了，对支持大小没有限制。 5 楼 johnliugang 2009-05-20   模拟器（sdk1.1）不支持流媒体，但是真机G1上是可以的，继续研究。。。 6 楼 lordhong 2009-05-21   现在的限制取消了, 以前是SDK R13的限制.
真机上也不是流媒体, HTTP Progressive download而已...