【实例简介】软件打开时，会加载本地的视频，所以可能会慢点，加载完毕后就可以 编辑视频了

【实例截图】

【核心代码】

package net.video.trimmer.view;

import net.video.trimmer.R;

import net.video.trimmer.model.VideoPlayerState;

import net.video.trimmer.service.VideoTrimmingService;

import net.video.trimmer.util.FileUtils;

import net.video.trimmer.util.TimeUtils;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.ProgressDialog;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.res.Configuration;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.os.Messenger;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.MediaController;

import android.widget.TextView;

import android.widget.VideoView;

public class ViewVideo extends Activity {

protected final int LOADING_DIALOG = 1;

protected final int MESSAGE_DIALOG = 2;

protected final int VALIDATION_DIALOG = 3;

private VideoView videoView;

private TextView detailView;

private VideoPlayerState videoPlayerState = new VideoPlayerState();

protected Handler completionHander = new Handler() {

@Override

public void handleMessage(Message msg) {

Log.e("VideoView", "VideoView Recieved message");

videoPlayerState.setMessageText(msg.getData().getString("text"));

removeDialog(LOADING_DIALOG);

showDialog(MESSAGE_DIALOG);

stopService(videoTrimmingServiceIntent());

}

};

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

Log.e("VideoView", "VideoView In on create");

setContentView(R.layout.video_player);

Object lastState = getLastNonConfigurationInstance();

if (lastState != null) {

videoPlayerState = (VideoPlayerState) lastState;

} else {

Bundle extras = getIntent().getExtras();

videoPlayerState.setFilename(extras.getString("videofilename"));

}

videoView = (VideoView) findViewById(R.id.VideoView);

videoView.setVideoPath(videoPlayerState.getFilename());

MediaController mediaController = new MediaController(this);

videoView.setMediaController(mediaController);

videoView.requestFocus();

videoView.start();

Button startButton = (Button) findViewById(R.id.Start);

startButton.setOnClickListener(startClickListener());

Button stopButton = (Button) findViewById(R.id.Stop);

stopButton.setOnClickListener(stopClickListener());

Button resetButton = (Button) findViewById(R.id.Reset);

resetButton.setOnClickListener(resetClickListener());

Button trimButton = (Button) findViewById(R.id.Trim);

trimButton.setOnClickListener(trimClickListener());

detailView = (TextView) findViewById(R.id.Details);

refreshDetailView();

}

@Override

public Object onRetainNonConfigurationInstance() {

Log.e("VideoView", "VideoView In on retain");

return videoPlayerState;

}

@Override

protected void onResume() {

super.onResume();

Log.e("VideoView", "VideoView In on resume");

videoView.seekTo(videoPlayerState.getCurrentTime());

}

@Override

protected void onPause() {

super.onPause();

Log.e("VideoView", "VideoView In on pause");

videoPlayerState.setCurrentTime(videoView.getCurrentPosition());

}

private OnClickListener trimClickListener() {

return new OnClickListener() {

@Override

public void onClick(View arg0) {

videoView.pause();

if(!videoPlayerState.isValid()) {

showDialog(VALIDATION_DIALOG);

return;

}

Intent intent = videoTrimmingServiceIntent();

String inputFileName = videoPlayerState.getFilename();

intent.putExtra("inputFileName", inputFileName);

intent.putExtra("outputFileName", FileUtils.getTargetFileName(inputFileName));

intent.putExtra("start", videoPlayerState.getStart()/1000);

intent.putExtra("duration", videoPlayerState.getDuration()/1000);

intent.putExtra("messenger", new Messenger(completionHander));

startService(intent);

showDialog(LOADING_DIALOG);

}

};

}

private Intent videoTrimmingServiceIntent() {

return new Intent(ViewVideo.this, VideoTrimmingService.class);

}

private OnClickListener resetClickListener() {

return new OnClickListener() {

@Override

public void onClick(View arg0) {

videoPlayerState.reset();

refreshDetailView();

}

};

}

private OnClickListener stopClickListener() {

return new OnClickListener() {

@Override

public void onClick(View arg0) {

int stop = videoView.getCurrentPosition();

videoPlayerState.setStop(stop);

refreshDetailView();

}

};

}

private OnClickListener startClickListener() {

return new OnClickListener() {

@Override

public void onClick(View arg0) {

videoPlayerState

.setStart(videoView.getCurrentPosition());

refreshDetailView();

}

};

}

@Override

protected void onPrepareDialog(int id, Dialog dialog) {

Log.e("VideoView", "VideoView In on prepare dialog");

switch (id) {

case MESSAGE_DIALOG:

((AlertDialog) dialog).setMessage(videoPlayerState.getMessageText());

break;

}

}

@Override

protected Dialog onCreateDialog(int id) {

Log.e("VideoView", "VideoView In on create dialog");

Dialog dialog;

switch (id) {

case VALIDATION_DIALOG:

dialog = simpleAlertDialog("Invalid video timings selected for trimming. Please make sure your start time is less than the stop time.");

break;

case LOADING_DIALOG:

dialog = ProgressDialog.show(ViewVideo.this, "", "Trimming...",true, true);

break;

case MESSAGE_DIALOG:

dialog = simpleAlertDialog("");

break;

default:

dialog = null;

}

return dialog;

}

private Dialog simpleAlertDialog(String message) {

Dialog dialog;

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setMessage(message).setCancelable(true)

.setPositiveButton("Ok",

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int id) {

ViewVideo.this.removeDialog(MESSAGE_DIALOG);

ViewVideo.this.removeDialog(LOADING_DIALOG);

}

});

dialog = builder.create();

return dialog;

}

private void refreshDetailView() {

String start = TimeUtils.toFormattedTime(videoPlayerState.getStart());

String stop = TimeUtils.toFormattedTime(videoPlayerState.getStop());

detailView.setText("Start at " start "\nEnd at " stop);

}

}