以Android App

时间：2015-05-19 17:15:20

标签： java android xml

我正在做一个Android应用，我想要显示旅行联系号码。这是代码：

AppActivity.java：

package com.example.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;

public class AppActivity extends Activity {
    Button button;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                Intent i=new Intent(AppActivity.this, App2Activity.class);
                i.putExtra("name1","Travels1");
                i.putExtra("number1","7843564358");
                i.putExtra("name2","Travels2");
                i.putExtra("number2","7664764358");
                i.putExtra("name3","Travels3");
                i.putExtra("number3","8804764358");
                startActivity(i);
            }
        });
    }
}

App2Activity.java：

package com.example.android;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class App2Activity extends Activity {
    TextView textView;
    Button button;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main2);

        final Button btnOne = (Button) findViewById(R.id.btnOne);
        final Button btnTwo = (Button) findViewById(R.id.btnTwo);
        final Button btnThree = (Button) findViewById(R.id.btnThree);

        String name1=getIntent().getStringExtra("name1");
        String number1=getIntent().getStringExtra("btnOne");
        String name2=getIntent().getStringExtra("name2");
        String number2=getIntent().getStringExtra("btnTwo");
        String name3=getIntent().getStringExtra("name3");
        String number3=getIntent().getStringExtra("btnThree");

        btnOne.setText(number1);
        btnTwo.setText(number2);
        btnThree.setText(number3);

        //textView = (TextView)findViewById(R.id.textView1);
        //textView.setText(name1 + "-" + number1 + " " + name2 + "-" + number2 + " " + name3 + "-" + number3);

        // set button texts from intent data here with getIntent()

        btnOne.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                Intent callIntent = new Intent(Intent.ACTION_DIAL);
                callIntent.setData(Uri.parse("tel:"+btnOne.getText()));
                startActivity(callIntent);
            }
        });

        btnTwo.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                Intent callIntent = new Intent(Intent.ACTION_DIAL);
                callIntent.setData(Uri.parse("tel:"+btnTwo.getText()));
                startActivity(callIntent);
            }
        });

        btnThree.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                Intent callIntent = new Intent(Intent.ACTION_DIAL);
                callIntent.setData(Uri.parse("tel:"+btnThree.getText()));
                startActivity(callIntent);
            }
        });
    }
}

main.xml中：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Travels and Holidays" />

</LinearLayout>

main2.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/btnOne"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge" />

     <TextView
        android:id="@+id/btnTwo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge" />

     <TextView
        android:id="@+id/btnThree"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

的strings.xml：

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">Travels and Holidays Details</string>

</resources>

的AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mkyong.android"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-permission android:name="android.permission.CALL_PHONE" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".AppActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:label="@string/app_name"
            android:name=".App2Activity" >
        </activity>
    </application>

</manifest>

Logcat说：

05-20 13:49:08.773: E/AndroidRuntime(29377): FATAL EXCEPTION: main
05-20 13:49:08.773: E/AndroidRuntime(29377): Process: com.example.android, PID: 29377
05-20 13:49:08.773: E/AndroidRuntime(29377): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android/com.example.android.App2Activity}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.ActivityThread.access$800(ActivityThread.java:151)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.os.Handler.dispatchMessage(Handler.java:102)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.os.Looper.loop(Looper.java:135)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.ActivityThread.main(ActivityThread.java:5254)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at java.lang.reflect.Method.invoke(Native Method)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at java.lang.reflect.Method.invoke(Method.java:372)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
05-20 13:49:08.773: E/AndroidRuntime(29377): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
05-20 13:49:08.773: E/AndroidRuntime(29377):    at com.example.android.App2Activity.onCreate(App2Activity.java:21)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.Activity.performCreate(Activity.java:5990)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
05-20 13:49:08.773: E/AndroidRuntime(29377):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
05-20 13:49:08.773: E/AndroidRuntime(29377):    ... 10 more
05-20 13:49:10.490: I/Process(29377): Sending signal. PID: 29377 SIG: 9

当我点击＆＃34;旅行和假期＆＃34;按钮，它直接转到呼叫选项，呼叫号码为784356435876647643588804764358。

我想要的是：点击＆＃34;旅行和假期＆＃34;按钮，它应该显示：

Travels1-7843564358   Call symbol
Travels2-7664764358   Call symbol
Travels3-8804764358   Call symbol

当我点击任何旅行的电话时，应该重定向到该号码的电话。

我哪里错了？

2 个答案:

答案 0 :(得分：0)

<强>问题

您被直接重定向到拨号器，因为呼叫意图是在第二个活动的onCreate中启动的。

这个长号的原因是一个textview存储了所有电话号码。在通话意图中，您传递完整的文本视图。

<强>解决方案

为了防止这种情况，您应该在第二个活动的布局文件中添加3个按钮（其中一个按钮存储一个电话号码）并在按钮中启动意图点击监听器传递存储在按钮中的电话号码（按钮文本）

在布局文件中添加三个新按钮（由第二个活动使用）后，将onCreate方法修改为：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btnOne = (Button)findViewById(R.id.button1);
    btnTwo = (Button)findViewById(R.id.button2);
    btnThree = (Button)findViewById(R.id.button3);

    // set button texts from intent data here with getIntent()

    btnOne.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:"+btnOne.getText()));
            startActivity(callIntent);
        }
    });

    btnTwo.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:"+btnTwo.getText()));
            startActivity(callIntent);
        }
    });

    btnThree.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:"+btnThree.getText()));
            startActivity(callIntent);
        }
    });
}

编辑添加了完整代码

好的，所以我在我的电脑上编写了应用程序，这里是代码：

<强> MainActivity.java 

public class MainActivity extends Activity{

Button button;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            Intent i=new Intent(MainActivity.this, SecondActivity.class);
            i.putExtra("name1","Travels1");
            i.putExtra("number1","7843564358");
            i.putExtra("name2","Travels2");
            i.putExtra("number2","7664764358");
            i.putExtra("name3","Travels3");
            i.putExtra("number3","8804764358");
            startActivity(i);
        }
    });   
}

}

<强> activity_main.xml中 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<Button
    android:id="@+id/button1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Travels and Holidays" />

</LinearLayout>

<强> SecondActivity.java 

public class SecondActivity extends Activity {

Button btnOne, btnTwo, btnThree;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);

    btnOne = (Button)findViewById(R.id.btnOne);
    btnTwo = (Button)findViewById(R.id.btnTwo);
    btnThree = (Button)findViewById(R.id.btnThree);

    // you dont need the names here, but maybe later
    String name1=getIntent().getStringExtra("name1");
    String name2=getIntent().getStringExtra("name2");
    String name3=getIntent().getStringExtra("name3");

    String number1=getIntent().getStringExtra("number1");
    String number2=getIntent().getStringExtra("number2");
    String number3=getIntent().getStringExtra("number3");

    btnOne.setText(number1);
    btnTwo.setText(number2);
    btnThree.setText(number3);

    btnOne.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:"+btnOne.getText()));
            startActivity(callIntent);
        }
    });

    btnTwo.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:"+btnTwo.getText()));
            startActivity(callIntent);
        }
    });

    btnThree.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:"+btnThree.getText()));
            startActivity(callIntent);
        }
    });
}

}

<强> activity_second.xml 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<Button
    android:id="@+id/btnOne"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge" />

 <Button
    android:id="@+id/btnTwo"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge" />

 <Button
    android:id="@+id/btnThree"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge" />

 </LinearLayout>

仅供参考：您收到强制转换异常的原因是因为您在activity_second.xml中有三个视图，其中TextViews和您将其作为按钮投放。

我希望它现在能帮到你！

答案 1 :(得分：0)

这个怎么样!!

显示AlertDialog或PopupWindow（查找教程here），其中ListView包含您要显示的项目。您不需要开始任何新的Acitivity将您的值传递为Extras。而是创建一个POJO，比如说Contact，如：

public class Contact {

    String name;
    String phone;

    public Contact(String name, String phone) {
        this.name = name;
        this.phone = phone;
    }

    @Override
    public String toString() {
        return this.name + "-" + this.phone;
    }
}

接下来，将您的数据填入说明final ArrayList<Contact> list = new ArrayList<Contact>();

喜欢list.add(new Contact(name1, number1));

我正在使用AlertDialog个实例，但您可以使用PopupWindow和AppActivity 

button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(App2Activity.this);
    AlertDialog alertDialog = dialogBuilder.create();
    LayoutInflater inflater = App2Activity.this.getLayoutInflater();
    View view = inflater.inflate(R.layout.alert_list, null);
    alertDialog.setView(view);
    ListView lv = (ListView) view.findViewById(R.id.listPhone);
    lv.setAdapter(new ArrayAdapter<Contact>(App2Activity.this, R.layout.alert_list_item, R.id.phoneItem,
            list));

    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            Object obj = parent.getItemAtPosition(position);
            if (obj instanceof Contact) {
                Contact contact = (Contact) obj;
                callIntent.setData(Uri.parse("tel:" + contact.phone));
                startActivity(callIntent);
            }
        }
    });
    alertDialog.show();
}

}）;

使用R.layout.alert_list设计ListView。设计R.layout.alert_list_item，例如TextView和ImageView水平对齐，其中ImageView有电话图标（下载任何电话图标，可能来自here）

你们都准备好了！

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