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我想在按下按鈕時啓動Main2Activity的任務(加載WebView),但不顯示Main2Activity的屏幕,直到onPageFinished()被調用。我有一些想法來通過Intents獲得這個,但它似乎不起作用。 這裏我的代碼:如何使用線程啓動活動任務?
MainActivity.java:
public class MainActivity extends AppCompatActivity {
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
Intent intent = new Intent(MainActivity.this,Main2Activity.class);
startActivity(intent);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button = (Button)findViewById(R.id.Button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final Runnable runnable = new Runnable() {
@Override
public void run() {
handler.sendEmptyMessage(0);
}
};
Thread thread = new Thread(runnable);
thread.start();
}
}
);
}
}
Main2Activity.java:
public class Main2Activity extends AppCompatActivity {
Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
final WebView webView = (WebView)findViewById(R.id.webview);
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(webView, url);
intent.putExtra("DONE",1);
// Toast.makeText(getApplicationContext(), "Done!",
//Toast.LENGTH_SHORT).show();
}
});
webView.loadUrl("file:///android_asset/2.2.html");
}
}
這是可能的使用意圖或我有一些其他的技術來做到這一點? 我如何實現這一目標?
謝謝大家。
感謝您的反饋,但我想留在MainActivity中,直到Main2Activity中的onPageFinished()被調用。 –