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Android-Download/app/src/main/java/com/example/arial/downloaddemo/MainActivity.java

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package com.example.arial.downloaddemo;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import com.arialyy.downloadutil.DownLoadUtil;
import com.arialyy.downloadutil.Util;
import java.net.HttpURLConnection;
public class MainActivity extends AppCompatActivity {
private static final int DOWNLOAD_PRE = 0x01;
private static final int DOWNLOAD_STOP = 0x02;
private static final int DOWNLOAD_FAILE = 0x03;
private static final int DOWNLOAD_CANCEL = 0x04;
private static final int DOWNLOAD_RESUME = 0x05;
private static final int DOWNLOAD_COMPLETE = 0x06;
private ProgressBar mPb;
private String mDownloadUrl = "http://static.gaoshouyou.com/d/12/0d/7f120f50c80d2e7b8c4ba24ece4f9cdd.apk";
private DownLoadUtil mUtil;
private Button mStart, mStop, mCancel;
private TextView mSize;
private Handler mUpdateHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case DOWNLOAD_PRE:
mSize.setText(Util.formatFileSize((Long) msg.obj));
mStart.setEnabled(false);
break;
case DOWNLOAD_FAILE:
Toast.makeText(MainActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
break;
case DOWNLOAD_STOP:
Toast.makeText(MainActivity.this, "暂停下载", Toast.LENGTH_SHORT).show();
mStart.setText("恢复");
mStart.setEnabled(true);
break;
case DOWNLOAD_CANCEL:
mPb.setProgress(0);
Toast.makeText(MainActivity.this, "取消下载", Toast.LENGTH_SHORT).show();
mStart.setEnabled(true);
mStart.setText("开始");
break;
case DOWNLOAD_RESUME:
Toast.makeText(MainActivity.this, "恢复下载,恢复位置 ==> " + Util.formatFileSize((Long) msg.obj), Toast.LENGTH_SHORT).show();
mStart.setEnabled(false);
break;
case DOWNLOAD_COMPLETE:
Toast.makeText(MainActivity.this, "下载完成", Toast.LENGTH_SHORT).show();
mStart.setEnabled(true);
mCancel.setEnabled(false);
mStop.setEnabled(false);
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
init();
}
private void init() {
mPb = (ProgressBar) findViewById(R.id.progressBar);
mStart = (Button) findViewById(R.id.start);
mStop = (Button) findViewById(R.id.stop);
mCancel = (Button) findViewById(R.id.cancel);
mSize = (TextView) findViewById(R.id.size);
mUtil = new DownLoadUtil();
}
public void onClick(View view) {
switch (view.getId()) {
case R.id.start:
start();
break;
case R.id.stop:
stop();
break;
case R.id.cancel:
cancel();
break;
}
}
private void start() {
mUtil.download(this, mDownloadUrl, Environment.getExternalStorageDirectory().getPath() + "/test.apk"
, new DownLoadUtil.DownloadListener() {
long fileSize = 1;
@Override
public void onPreDownload(HttpURLConnection connection) {
super.onPreDownload(connection);
mPb.setMax(100);
fileSize = connection.getContentLength();
mUpdateHandler.obtainMessage(DOWNLOAD_PRE, fileSize).sendToTarget();
}
@Override
public void onStart(long startLocation) {
super.onStart(startLocation);
}
@Override
public void onChildResume(long resumeLocation) {
super.onChildResume(resumeLocation);
}
@Override
public void onChildComplete(long finishLocation) {
super.onChildComplete(finishLocation);
}
@Override
public void onProgress(long currentLocation) {
super.onProgress(currentLocation);
mPb.setProgress((int) (currentLocation * 100 / fileSize));
}
@Override
public void onStop(long stopLocation) {
super.onStop(stopLocation);
mUpdateHandler.obtainMessage(DOWNLOAD_STOP).sendToTarget();
}
@Override
public void onCancel() {
super.onCancel();
mUpdateHandler.obtainMessage(DOWNLOAD_CANCEL).sendToTarget();
}
@Override
public void onResume(long resumeLocation) {
super.onResume(resumeLocation);
mUpdateHandler.obtainMessage(DOWNLOAD_RESUME, resumeLocation).sendToTarget();
}
@Override
public void onFail() {
super.onFail();
mUpdateHandler.obtainMessage(DOWNLOAD_FAILE).sendToTarget();
}
@Override
public void onComplete() {
super.onComplete();
mUpdateHandler.obtainMessage(DOWNLOAD_COMPLETE).sendToTarget();
}
});
}
private void stop() {
mUtil.stopDownload();
}
private void cancel() {
mUtil.cancelDownload();
}
}