「Android/非同期処理/HandlerRunnable」の版間の差分
提供: 初心者エンジニアの簡易メモ
(→サンプル(Runnableクラス切り分け)) |
(→サンプル(Runnableクラス切り分け)) |
||
| 行4: | 行4: | ||
MainActivity.java | MainActivity.java | ||
<pre> | <pre> | ||
| − | TextView textView = findViewById(R.id.text1); | + | final TextView textView = findViewById(R.id.text1); |
final Handler handler = new Handler(Looper.getMainLooper()); | final Handler handler = new Handler(Looper.getMainLooper()); | ||
MyRunnableTask task = new MyRunnableTask(handler, textView); | MyRunnableTask task = new MyRunnableTask(handler, textView); | ||
2020年8月7日 (金) 16:01時点における版
参考：https://qiita.com/8yabusa/items/f8c9bb7eb81175c49e97
サンプル(Runnableクラス切り分け)
MainActivity.java
final TextView textView = findViewById(R.id.text1);
final Handler handler = new Handler(Looper.getMainLooper());
MyRunnableTask task = new MyRunnableTask(handler, textView);
new Thread(task).start();
<pre>
MyRunnableTask.java
<pre>
import android.os.Handler;
import android.widget.TextView;
public class MyRunnableTask implements Runnable {
Handler mHandler;
TextView mTextView;
public MyRunnableTask(Handler handler, TextView textView) {
mHandler = handler;
mTextView = textView;
}
public void run() {
final String msg = "background exec";
if (mHandler != null) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (mTextView != null) {
mTextView.setText(msg);
}
}
});
}
}
}
