[英]How to link images with texts in android studio?
我正在尝试制作一个为每个图像显示文本的应用程序,我已经导入了四个图像和四个文本视图,但是当我按任意图像时,它会显示相同的文本。 并同时显示4个文本
如何在每个图像上显示不同的文本。 (我正在Main2Activity中工作)
xml代码
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="WELCOME "
android:id="@+id/t1"
android:textSize="50dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="49dp"
android:checked="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="ANDROID"
android:id="@+id/t3"
android:textSize="50dp"
android:layout_above="@+id/t4"
android:layout_centerHorizontal="true"
android:layout_marginBottom="45dp"
android:checked="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="STUDIO"
android:id="@+id/t4"
android:textSize="50dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="91dp"
android:checked="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="TO"
android:id="@+id/t2"
android:layout_below="@+id/t1"
android:layout_centerHorizontal="true"
android:layout_marginTop="47dp"
android:textSize="50dp"
android:checked="false"/>
JAVA代码
公共类Main2Activity扩展Activity实现View.OnClickListener {TextView t1,t2,t3,t4,textview;
@Override
public void onCreate (Bundle savedInstanceState, PersistableBundle persistentState) {
super.onCreate (savedInstanceState, persistentState);
setContentView(R.layout.activity_main);
t1 = (TextView) findViewById (R.id.text);
t1.setOnClickListener (this); //here you're setting onClickListener to listen for taps
textview = (TextView) findViewById (R.id.t1);
t2.setOnClickListener (this);
textview = (TextView) findViewById (R.id.t2);
t3.setOnClickListener (this);
textview = (TextView) findViewById (R.id.t3);
t4.setOnClickListener (this);
textview = (TextView) findViewById (R.id.t4);
}
@Override
public void onClick (View v) { //this is an implementation of OnClickListener interface
switch (v.getId ()){ //here you're reading id of the taped button and doing something depending on what TextView taped
case R.id.t1:
t1.setText ("leo");
break;
case R.id.t2:
t2.setText ("mike");
break;
case R.id.t3:
t3.setText ("raph");
break;
case R.id.t4:
t4.setText ("don");
break;
}}}
您需要在声明TextViews的活动中实现View.OnClickListener。 代码应该看起来像这样
@Override
public void onCreate (Bundle savedInstanceState, PersistableBundle persistentState) {
super.onCreate (savedInstanceState, persistentState);
setContentView(R.layout.activity_main);
t1 = (TextView) findViewById (R.id.t1);
t1.setOnClickListener (this);
t2 = (TextView) findViewById (R.id.t2);
t2.setOnClickListener (this);
t3 = (TextView) findViewById (R.id.t3);
t3.setOnClickListener (this);
t4 = (TextView) findViewById (R.id.t4);
t1.setOnClickListener (this);
}
@Override
public void onClick (View v) { //this is an implementation of OnClickListener interface
switch (v.getId ()){ //here you're reading id of the taped button and doing something depending on what TextView taped
case R.id.t1:
t1.setText ("leo");
break;
case R.id.t2:
t2.setText ("mike");
break;
case R.id.t3:
t3.setText ("raph");
break;
case R.id.t4:
t4.setText ("don");
break;
}}}
如果您有多个TextView,则需要在每个上都设置.setOnClickListener(this)
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