import android.app.Activity; |
import android.app.ProgressDialog; |
import android.os.Bundle; |
import android.view.View; |
import android.widget.Button; |
import android.widget.TextView; |
public class EX03_18 extends Activity { |
private Button mButton1; |
private TextView mTextView1; |
public ProgressDialog myDialog = null ; |
/** Called when the activity is first created. */ |
@Override |
public void onCreate(Bundle savedInstanceState) { |
super .onCreate(savedInstanceState); |
setContentView(R.layout.main); |
mButton1 = (Button) findViewById(R.id.myButton1); |
mTextView1 = (TextView) findViewById(R.id.myTextView1); |
mButton1.setOnClickListener(myShowProgressBar); |
} |
Button.OnClickListener myShowProgressBar = new Button.OnClickListener() { |
public void onClick(View arg0) { |
final CharSequence strDialogTitle = getString(R.string.str_dialog_title); |
final CharSequence strDialogBody = getString(R.string.str_dialog_body); |
// 显示Progress对话框 |
myDialog = ProgressDialog.show(EX03_18. this , strDialogTitle, |
strDialogBody, true ); |
mTextView1.setText(strDialogBody); |
new Thread() { |
public void run() { |
try { |
/* 在这里写上要背景执行的程序片段 */ |
/* 为了明显看见效果,以暂停3秒作为示范 */ |
sleep( 3000 ); |
} catch (Exception e) { |
e.printStackTrace(); |
} finally { // 卸除所建立的myDialog对象。 |
myDialog.dismiss(); |
} |
} |
}.start(); /* 开始执行线程 */ |
} |
/* End: public void onClick(View arg0) */ |
}; |
} |