Android中如何實(shí)現(xiàn)自動(dòng)更新
本篇內(nèi)容介紹了“Android中如何實(shí)現(xiàn)自動(dòng)更新”的有關(guān)知識(shí)，在實(shí)際案例的操作過程中，不少人都會(huì)遇到這樣的困境，接下來就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧！希望大家仔細(xì)閱讀，能夠?qū)W有所成！
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代碼如下：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
public class Update extends BaseActivity {
public ProgressDialog pBar;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.update);
Dialog dialog = new AlertDialog.Builder(Update.this).setTitle("系統(tǒng)更新")
.setMessage("發(fā)現(xiàn)新版本，請(qǐng)更新！")// 設(shè)置內(nèi)容
.setPositiveButton("確定",// 設(shè)置確定按鈕
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
pBar = new ProgressDialog(Update.this);
pBar.setTitle("正在下載");
pBar.setMessage("請(qǐng)稍候...");
pBar
.setProgressStyle(ProgressDialog.STYLE_SPINNER);
downFile("http://url:8765/OA.apk");
}
}).setNegativeButton("取消",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// 點(diǎn)擊"取消"按鈕之后退出程序
}
}).create();// 創(chuàng)建
// 顯示對(duì)話框
dialog.show();
}
void downFile(final String url) {
pBar.show();
new Thread() {
public void run() {
HttpClient client = new DefaultHttpClient();
// params[0]代表連接的url
HttpGet get = new HttpGet(url);
HttpResponse response;
try {
response = client.execute(get);
HttpEntity entity = response.getEntity();
long length = entity.getContentLength();
InputStream is = entity.getContent();
FileOutputStream fileOutputStream = null;
if (is != null) {
File file = new File(Environment
.getExternalStorageDirectory(), "OA.apk");
fileOutputStream = new FileOutputStream(file);
byte[] buf = new byte[1024];
int ch = -1;
int count = 0;
while ((ch = is.read(buf)) != -1) {
// baos.write(buf, 0, ch);
fileOutputStream.write(buf, 0, ch);
count += ch;
if (length > 0) {
}
}
}
fileOutputStream.flush();
if (fileOutputStream != null) {
fileOutputStream.close();
}
down();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}.start();
}
void down() {
handler.post(new Runnable() {
public void run() {
pBar.cancel();
update();
}
});
}
void update() {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File("/sdcard/OA.apk")),
"application/vnd.android.package-archive");
startActivity(intent);
}
}“Android中如何實(shí)現(xiàn)自動(dòng)更新”的內(nèi)容就介紹到這里了，感謝大家的閱讀。如果想了解更多行業(yè)相關(guān)的知識(shí)可以關(guān)注創(chuàng)新互聯(lián)網(wǎng)站，小編將為大家輸出更多高質(zhì)量的實(shí)用文章！
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