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我昨天上傳了我的應用程序到Google Play，今天早上我只想做一個佈局調整，因爲一些文本在較小的屏幕上重疊按鈕，基本上我只想移動按鈕進一步在屏幕下方。我認爲這將和使用eclipse的圖形編輯器一樣簡單......不。Android應用程序點擊按鈕調用不正確的OnClick監聽器
我不知道爲什麼，但我已經做了我的「view_fact」佈局按鈕位置的小編輯註冊了錯誤的OnClick監聽器的按鈕，視圖上只有兩個按鈕，他們是使用eachothers事件聽衆，我不知道爲什麼。我沒有觸及完全在舊佈局上工作的事件監聽器代碼。
這裏是我的view_fact佈局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/viewFactTitleText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="18dp"
android:text="@string/factTitleText"
android:textSize="22dp"
tools:context=".MainActivity" />
<ImageView
android:id="@+id/randomFactImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/viewFactTitleText"
android:layout_centerHorizontal="true"
android:layout_marginTop="18dp"
android:contentDescription="Fact Image"
android:src="@drawable/canadaflag" />
<TextView
android:id="@+id/factData"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_below="@+id/randomFactImage"
android:layout_centerHorizontal="true"
android:layout_marginTop="14dp"
android:text="TextView" />
<Button
android:id="@+id/anotherFactButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/backToHomeButton"
android:layout_alignLeft="@+id/backToHomeButton"
android:layout_alignRight="@+id/backToHomeButton"
android:text="@string/anotherFactButtonText" />
<Button
android:id="@+id/backToHomeButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/factData"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/factData"
android:text="@string/backToHomeButtonText" />
</RelativeLayout>
監聽器和啓動代碼：
public class MainActivity extends Activity {
/* Declaration of global variables */
private boolean debugMode = true; // Whether debugging is enabled or not
private static String logtag = "CanadianFacts"; // For use as the tag when logging
private TextView factData;
private int totalFacts = 72;
private String[][] facts = new String[totalFacts][5];
private int lastFact = 0;
/* Buttons */
/* Home page */
private Button randomFactButton;
/* View Fact page */
private Button anotherRandomFactButton;
private Button backToHomeButton;
/* About page */
private Button backToHomeFromAboutButton;
/* Image Views */
private ImageView randomFactImage;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/* Home Page Objects */
randomFactButton = (Button)findViewById(R.id.randomFactButton);
randomFactButton.setOnClickListener(randomFactListener); // Register the onClick listener with the implementation above
/* View Fact Page Objects */
/* Build Up Fact Array */
buildFactArray();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_about:
loadAboutPage(); // Call the loadAboutPage method
return true;
}
return false;
}
public void loadAboutPage() {
setContentView(R.layout.about);
/* Set up home page button listener */
backToHomeFromAboutButton = (Button)findViewById(R.id.backToHomeFromAboutButton);
backToHomeFromAboutButton.setOnClickListener(backToHomeListener); // We can reuse the backToHomeListener
}
/* Home Page Listeners */
//Create an anonymous implementation of OnClickListener, this needs to be done for each button, a new listener is created with an onClick method
private OnClickListener randomFactListener = new OnClickListener() {
public void onClick(View v) {
if (debugMode) {
Log.d(logtag,"onClick() called - randomFact button");
Toast.makeText(MainActivity.this, "The random fact button was clicked.", Toast.LENGTH_LONG).show();
}
setContentView(R.layout.view_fact); // Load the view fact page
/* We're now on the View Fact page, so elements on the page are now in our scope, instantiate them */
/* Another Random Fact Button */
anotherRandomFactButton = (Button)findViewById(R.id.anotherFactButton);
anotherRandomFactButton.setOnClickListener(anotherRandomFactListener); // Register the onClick listener with the implementation above
/* Back to Home Button */
backToHomeButton = (Button)findViewById(R.id.backToHomeButton);
backToHomeButton.setOnClickListener(backToHomeListener); // Register the onClick listener with the implementation above
// Get a random fact
String[] fact = getRandomFact();
if (fact[2] == null) { // If this fact doesn't have an image associated with it
fact[2] = getRandomImage();
}
int imageID = getDrawable(MainActivity.this, fact[2]);
/* See if this fact has an image available, if it doesn't select a random generic image */
randomFactImage = (ImageView) findViewById(R.id.randomFactImage);
randomFactImage.setImageResource(imageID);
factData = (TextView) findViewById(R.id.factData);
factData.setText(fact[1]);
if (debugMode) {
Log.d(logtag,"onClick() ended - randomFact button");
}
}
};
/* View Fact Page Listeners */
private OnClickListener anotherRandomFactListener = new OnClickListener() {
public void onClick(View v) {
if (debugMode) {
Log.d(logtag,"onClick() called - anotherRandomFact button");
Toast.makeText(MainActivity.this, "The another random fact button was clicked.", Toast.LENGTH_LONG).show();
}
// Get a random fact
String[] fact = getRandomFact();
if (fact[2] == null) { // If this fact doesn't have an image associated with it
fact[2] = getRandomImage();
}
int imageID = getDrawable(MainActivity.this, fact[2]); // Get the ID of the image
/* See if this fact has an image available, if it doesn't select a random generic image */
randomFactImage = (ImageView) findViewById(R.id.randomFactImage);
randomFactImage.setImageResource(imageID);
factData = (TextView) findViewById(R.id.factData);
factData.setText(fact[1]);
if (debugMode) {
Log.d(logtag,"onClick() ended - anotherRandomFact button");
}
}
};
private OnClickListener backToHomeListener = new OnClickListener() {
public void onClick(View v) {
if (debugMode) {
Log.d(logtag,"onClick() called - backToHome button");
Toast.makeText(MainActivity.this, "The back to home button was clicked.", Toast.LENGTH_LONG).show();
}
// Set content view back to the home page
setContentView(R.layout.main); // Load the home page
/* Reinstantiate home page buttons and listeners */
randomFactButton = (Button)findViewById(R.id.randomFactButton);
randomFactButton.setOnClickListener(randomFactListener); // Register the onClick listener with the implementation above
if (debugMode) {
Log.d(logtag,"onClick() ended - backToHome button");
}
}
};
謝謝。